Genital Wart Facts

Genital warts are a type of wart that are only found on your private parts of the body. The genital wart is one that will be easily recognized. Genital warts are also known as veneral warts and also as condylmata acuminata. Warts in this manner are caused by a skin infection, which is known as PHV infection. It is possible to have the HPV infection without having genital warts. Genital warts are often passed along during sexual intercourse, but not all those who have genital warts are going to know they are infected until the warts are bigger and a little more painful.

Warts are a virus, that can be passed by touching, sitting and skin to skin contact. The most common types of warts are seen on people’s hands and feet, which are a different form of a wart but are generally the same thing if you are wondering what genital warts really are.

Warts are associated with the tumors that form under and in the skin. The tumors are forms of the HPV infection, and will form warts as the body rids the infection from the body. If you have warts on the hand or on the feet, you are not going to spread this to your genitals. If you know someone who has genital warts, they are not going to give you warts on your hands and the same goes the other way around.

For the woman, if you have genital warts, they will appear on the inside and the outside of the vagina. If the woman has anal sex, the genital warts could appear an the anus, and the same is for the man. If a man is having anal sex with another, the genital warts could appear on the anus area as well.

The warts will appear in the same area, taking a long time to spread out. Sometimes the warts will disappear on their own, but only in rare cases often times the genital warts will spread becoming crusty and become large areas of warts over the private areas of a male or female. If you have genital warts, and someone performs oral sex, the genital warts can be transmitted to that person. Genital warts can be treated by a doctor, and with medications. If not treated, often times genital warts can become troublesome not only for the person suffering with them, but for people you love and want to share that special relationship with.

If you have sex with someone that you later finds out has genital warts, you most likely are going to end up with genital warts are well. It can take any where from one month to three months for genital warts to appear and become large enough for a person to notice them. Always protect yourself by avoiding having sex with anyone you don’t know or trust not to have genital warts.

You can find more info about genital warts on

http://www.all-about-genital-wart.com/

What Is The Difference Between Investment Management and Stockbrokers?

The investment services industry can be daunting and ambiguous for individuals who seek a return on their capital. After working hard earning your wealth, it is important to understand the different services offered by professionals and what solutions fit you personally. One of the main questions we get asked here is:

“What is the difference between investment management and stockbrokers?”

Firstly, let’s discuss what stockbrokers are – we all have a much better, clearer, idea of what they do and who they represent. Stockbrokers are regulated firms that offer financial advice to their clients. A stockbroker buys and sells equities and other securities like bonds, CFDs, Futures and Options on behalf of their clients in return for a fee or commission. A brokerage / stockbroker will receive a fee on each transaction, whether the idea is profitable or not.

A brokerage can specialise in any investment niche they wish for example:

  • FTSE All-Share stocks,
  • AIM stocks,
  • European Stocks,
  • Asian Stocks,
  • US Stocks
  • Combinations of the above
  • Straight equities,
  • Straight derivative trading (CFDs, Futures & Options)

The main reason why investors choose stockbrokers over any other professional investment service is simply down to control. Due to the nature of a brokerage firm, they can only execute a trade after you instruct them to do so. This means it is impossible for a brokerage to keep buying and selling securities without you knowing – known as churning for commission. This doesn’t however prevent stockbrokers providing you with several new ideas a week and switching your positions to a new idea.

However, there are natural flaws with the brokerage industry is that because trading ideas can only be executed after being instructed to list a few flaws;-

  • you may miss out of good opportunities due to moves in the market,
  • you may get in a couple of days later because you were busy and not make any money after fees,
  • you may receive a call to close a position but unable to without your say so.

The above are examples that can happen when investing with brokerage firms, but this is due to the reliance of gaining authorisation from their clients. So if you are ultra busy or travel a lot then you could potentially miss out on opportunities to buy or sell.

What are investment managers?

Now we understand what stockbrokers / brokerage firms are about, let’s discuss what investment management services can do for individuals.

Investment management firms run differently to brokerages. The core aspect to these services is that the professional investment managers use their discretion to make investment decisions. As a client of an investment management firm you will go through a rigorous client on boarding process (just like a brokerage firm) to understand your investment goals, understanding of the services being used, risk profile, angering to the investment mandate and allowing the service to manage your equity portfolio. The sign up with the service may seem long winded but it’s in your best interest to ensure the service is suitable and appropriate for you. In reality, it’s not a long winded process at all. Once you agree to the services offered then you will only be updated on the on-going account data and portfolio reporting in a timely manner. This means no phone calls to disrupt your day-to-day activities and allows the professionals to focus on your portfolio.

Investment management firms usually have specific portfolios with a track record, into which you can invest your capital according to you appetite for risk. These portfolios will focus on specific securities, economies, risk and type of investing (income, capital growth or balanced). All of this would be discussed prior or during the application process.

Another method used by investment management firms is different strategies implemented by their portfolio managers. These strategies are systematic and go through thorough analysis before investment decisions are made.

The fees usually associated with investment management firms can vary from each firm. There are three common types of fees and are usually combined, fees can be;-

  • Assets Under Management Fee – This is where you pay a percentage of the portfolio per year to the firm, usually an annual fee. E.g) 1% AUM Fee on £1,000,000 is £10,000 per year.
  • Transaction Fee – This is a fee associated with each transaction made through your portfolio – similar to the brokerage firm’s commission.
  • Percentage of Profits Fee – This is where any closed profits generated over a set time will be charged to the firm. E.g) 10% PoP Fee – the firm generates you closed profit of £10,000 in one quarter – you will be charged £1,000.

The main benefits provided from investment management firms is that after the service understands your needs and tailors the service around you, it is their job to build a portfolio around you. It is also the job of the investment management firm to adhere to the investment mandate you agreed on, we’ll take about this later, so you understand of the time frame given what you should expect. Another bonus why high-net worth individuals choose investment management services is because they are not hassled by phone calls every other day with a new investment idea.

The difference…

The main difference between investment management and stockbroking firms is:

  • Investment Managers offers discretionary services; no regular phone calls about stock ideas.
  • Stockbrokers give you more control as you can personally filter out ideas you think won’t work.
  • Investment Managers offer an investment mandate; this is where the investment management service provides a document of what they are offering you in return of managing your portfolio. You will understand what exactly they are targeting over the year, based on what risk, and should they achieve it – then they have fulfilled their service. E.g) the mandate could state that the strategies used and based on 8% volatility (risk), they seek to achieve 14% capital return.
  • Stockbrokers do not offer an future agreements but look to deliver growth during the time you are with them. They are not bound by their performances like investment managers.
  • Investment management firms have a track record for all of the strategies and services used, stockbrokers do not.

Which to choose?

Both services provide professional approaches to investing in the stock markets. Stockbrokers are chosen over investment managers by people who like to be in control and receive financial advice. Stockbrokers generally do not have a systematic approach to the markets but use selective top-down approaches to select stocks.

Investment managers are chosen by investors who want an agreement on their performances over the year and understand the risk up-front. Usually more sophisticated investors that wish to take advantage of the track-record and gain an understanding of the systematic approach used by the investment management firm.

Feel free to learn more.

DISCLAIMER: The above is not considered financial advice or any endorsement to use any particular service. If you wish to use any of the services mentioned, please seek independent advice.

RISK WARNING: Spread betting, CFD, futures and options trading carries a high level of risk to your capital and can result in losses that exceed your initial deposit. They may not be suitable for everyone, so please ensure that you fully understand the risks involved. Past performance of a managed service is not a guide to future performance.

Interactive Technology in Healthcare Education

Healthcare professionals are under pressure to remember, utilize and absorb vast amounts of new or changing information in increasing volume. This surge has led to new and improved computer-based tools for many healthcare activities and to an explosion in the marketplace of tools used in instruction and education of healthcare workers. This article explains the use of interactive technology in healthcare and how this benefits instruction and education of healthcare professionals.

Digital systems that capture images from documents, 35-mm slides, physical samples or specimens, or virtually anything that the camera lens can see, is found in interactive technology. In healthcare, transmitting these images to computers with simple devices or software that will allow the display and integration of educational material into the training environment is easily accommodated.

The method for delivering these images or documents, usually via PowerPoint presentations, photography, videotape or audio presentations can turn a standard Windows PC into a dynamic, interactive, teaching tool. Depending on the type of training environment needed, interactive presentations can be found in the use of liquid crystal displays, large plasma displays, rear projection systems or even whiteboards. Educators can now tailor their courses to their audience’s expectations and needs using any number of these presentation forms.

Effectiveness of interactive learning systems is largely dependent upon the type or form of delivery used in combination with software that is easily used by both novice and expert users. Smaller systems will use a pen or stylus vs. a computer and a mouse where larger systems may use elaborate videoconferencing systems where many participants can be in the virtual classroom at the same time. Many healthcare organizations already utilize small and large types of communication systems routinely in the delivery of quality, high-tech healthcare to patients and their community. Adapting this equipment or having it serve dual purposes is an easy and cost-effective transition.

The era of the blackboards and chalk dust is now a memory for most of us. Interactive technology tools permit the educator to draw on, write on, and annotate data right on the screen as part of their dynamic presentation. In addition, the educator can now annotate their presentation and then save, print and even distribute by email, the contents of the class session to all participants.

The mobility that interactive technology gives the educator in the virtual classroom lends itself to unlimited types of uses and methods for delivery of high quality, interactive, sessions. Participants, too, benefit from easy access to the sessions, improved and more accurate note-taking that can be used later for study and reference. This all leads to greater retention of the learning objectives and enhanced or improved application in the field once the participant returns to the office or department.

Healthcare professionals should look for educators and learning systems that combine ergonomics with interactive technologies that integrate use the user of free text, annotation, images and video clips with the traditional printed materials. Transitions between screens or programs, linking to the Internet and class sessions, downloading or printing of the course materials and saving of files or information for future classes or reference use should be easy and simple to use. The presentation and delivery of the educational material should be efficient and easy to use and tailored to use by both healthcare professionals that have varying levels of technological skills.

Regardless of whether healthcare workers are new to the workplace or seasoned professionals, the learning systems used should assist them with learning new skills, procedures, diagnostic techniques and terminology. Communication between healthcare workers in both local and distant communities is on the rise and the use of interactive technology enables the participants to collaborate and share critical data and information.

Interactive technology can also benefit the bottom line and reduce costs formerly associated with travel or staffing and resources to send workers to local, regional or national meetings. Interactive presentations and systems can also attract and hold the participants interest and attention, enhancing their learning and retention gained from the course(s).

It is no wonder, then, that interactive technology has gained such a strong and prominent position in the education of healthcare workers. Healthcare workers looking for either online, distance or local training should evaluate the presentation and delivery systems used in order to maximize their learning experience.

PUBLISHING RIGHTS:

You have permission to publish this article electronically, in print, in your e-book or on your website, free of charge, as long as the author’s information and web link are included at the bottom of the article and the article is not changed, modified or altered in any way. The web link should be active when the article is reprinted on a web site or in an email. The author would appreciate an email indicating you wish to post this article to a website, and the link to where it is posted.

Copyright 2005, M. A. Webb. All Rights Reserved

Myths About MRSA Infections

MRSA Myth #1: Methicillin Resistant Staph Aureus is a new Problem

This is simply not true. MRSA has been it a problem in the hospital environment for years. Microbial resistance first showed up shortly after the introduction of penicillin into mass use. The medical community has had a problem with resistant bacteria for a long time and it has known about it. Every hospital in the US has an Infection Control Coordinator whose job it is to monitor infection rates in these institutions. The MRSA antibiotic susceptibility rates (along with those of other known super bugs) are monitored with incredible accuracy because the hospital must know when an antibiotic isn’t working. It is important for an hospital to know when their antibiotic formulary choices are no longer effective.

MRSA Myth #2: MRSA Infections are not Deadly

If not identified quickly and treated appropriately, death from MRSA infection is a real possibility. It is important to have culture and susceptibility testing on the wound to be sure the antibiotic regimen is appropriate. This test procedure takes about 48-72 hours. This testing will identify what type of organism is causing the infection and determine the appropriate course of antibiotic treatment. The worst treatment is the antibiotic treatment that will not work. It is a terrible costly waste of precious time and money.

MRSA Myth #3: MRSA is Transmitted by person-to-person contact.

Yes, this is one mechanism of   transmission  from patient to patient, and as it may be the primary means acquiring a MRSA infection, this fact underscores the need for diligent hand washing by anyone in contact with hospital patients. What is not often addressed is that MRSA can also be contracted from equipment used in the hospital and also from the environment.

MRSA Myth #4: MRSA is the only Resistant organism

Not true! Methicillin resistant staph aureus is the organism that has gotten the recent press coverage, but there are a number of other multiply-resistant microorganisms out there. For instance, the organism that causes TB has developed resistance which is well documented. Beyond these, there are a number of other super bugs we should all be concerned about.

MRSA Myth #5: MRSA Infections are limited to Humans

Believe it or not, MRSA can infect animals, too. In addition to person-to-person  transmission , MRSA infections can also be transmitted from person-to-animal. MRSA infections have been found in dogs and cats and other animals. The presence of MRSA in animals is manifested in the same way as human infection. We should be concerned about the health and safety of our pets, too.

The Importance of Food in Our Life

Food is the basic necessity for all of us and we all earn money to get this basic necessity. We need to eat 3 meals a day to keep our body running so that we can manage our daily functions. Many of us ” Eat food to live” while there are others who “Live to eat food”. In fact, nutrition assumes a special importance in each and everyone’s life.

Types of Foodstuff

The food is normally divided into two main categories given below:-

1- Vegetarian food- These include stuffs like milk, fruits and vegetables. These are those stuff that are obtained from plants and trees.

2- Non- Vegetarian food- These include stuffs like meat and meat products, chicken, turkey, fish, squid etc. Non vegetarian food are generally obtained by killing animals.

Nutrition from Foodstuff

Nutrition from food is necessary and without this daily dose of nutrition animals may not survive for long. It is important to support life as nourishment obtained helps the cells present in our body to carry out its routine functions. Different stuffs provide different levels of nutrition. The nutrients are divided into six classes which are given below:-

1- Carbohydrates- These provide energy to the body and are found in items like rice, bread and other grain products.

2- Fats- It consists of a group of compounds that are generally insoluble in water. These are found in items like butter, ghee, fish oil, lard etc. Fats are stored in the human body for use at a later use for energy.

3- Minerals- These are needed for the maintenance of proper functions in the body like the transport of oxygen throughout the body, stimulating growth, normalizing the nervous system etc. Minerals can be found from a variety of food items such as meat, cereals including cereal products such as bread, fish, milk and dairy foods.

4- Protein- These are important components of muscles, skin and hair. Proteins are helpful in creation of various enzymes in the body that control various important functions. Major sources of protein include milk, meat, fish, egg, and vegetables.

5- Vitamins- They are an essential component of animal body required for good health. It is organic compound required as a nutrient. Good sources of vitamins are fruits, vegetables, cereals, milk and eggs.

6- Water- It is popularly known as the”elixir of life”. The human body comprises of 55-78 % of water. It is required for the essential functioning of the various important parts of the human body.

Thus, these points given above reflect the importance of food and nutrients in our diet. As long as a human is alive, he needs water and foods in the required quantity.

How Your Choice in Cars Reflects Your Personality

Automobiles have become an integral part of our society. Intended to be used as a tool to get from point A to point B cars have extended their use in today’s society.

This article discusses a few points on car selection and personality. Cars have long stopped being tools that get us from one point to another and have transformed into status symbols and reflect the driver’s values and personality.

Often people judge a person by the car they drive. If you are stepping out a Bentley for example, you would garner much respect from just about anyone who witnesses you getting out of the car.

The condition and look of your car has extended the mantra of your discipline being reflected on how your wear your clothes. Being seen parking a dirty car is the equivalent to going to the office in a disheveled suit. Analogously, alighting from an impeccably detailed car is the prim and proper look that many office executives are known for.

In fact nowadays what you drive adds more to your reputation than what you wear. Studies have shown than rides reflect more of the personality of the person than clothes. Cars have ceased becoming tools and have transcended into the realm of lifestyle.

Playboys want fast looking coupes while daddies are opting to get minivans. Buicks are said to cater to the less internet savvy drivers compared to Honda which has an overwhelmingly digital age buyer group.

This trend even goes to driving tendencies. Sports cars owners tend to be a little less patient on the stop light than station wagon drivers. The gigantic proportions of some SUVs tend to make their owners bully smaller sized vehicles in rush hour traffic.

Brands like Lexus are tend to be bought by wealth and well educated owners. Aside from that demographic the brand caters mostly to married couples. This reflects stability and a more settled down personality for the buyers.

Your choices in the car you are driving very much reflect your personality. Stop thinking of your car as something that takes from one place to another but take great care in choosing your car. You may not think it matters but your peers will gauge your personality on the car you drive.

Analysis of an Outstanding English Essay “Work” by John Ruskin

John Ruskin (1819 -1900) was an English art critic and social thinker, also remembered as a poet and artist. He wrote a number of essays on art and architecture that became extremely influential in the Victorian era. He takes material for his lecture “Work” from the existing economic revolution which is generally referred to as “Industrial Revolution”. Apart from its advantages and benefits it brought a great destruction for the poor people. The writer reveals the general facts and harsh realities which were ignored even by those who themselves were the main victim of revolution.

What is Working Class?

Ruskin, in the very beginning, is going to clarify the matter that what it is meant by “working class”. Most probably it is the opposite of “idle class”. Then “idle class” will be the synonym of “upper class”. At this point, Ruskin asks question to his audience whether he is correct in drawing this distinction or not. The question is asked only with the intention to gain the sympathy of his audience so that to convince them about his own arguments.

Then, he rejects the above mentioned distinction because the idle people may be found in both rich and poor classes. There is a working class among both rich and poor and there is also an idle class among both rich and poor. So the distinction between working class and upper class has been proved to be wrong. As the topic of his lecture is work, the writer sticks to the working class. He draws organized distinction between the two classes in various respects. The following are the major distinctions vividly drawn by the author.

First Distinction

This distinction is between two classes; those who work and those who play. It can be understood easily after knowing the difference between work and play. “Play” has been derided for the purpose of pleasure with no determined end while work is something totally different which is intended to earn benefit and is done with some determined end. The writer critically analyzes some popular work of England that are worthy to be called “games”.

“The first English game is making money”

This is an ironical statement for those who earn money blindly. Such people don’t know why they are earning money and what they will do with it? They are in fact players, playing the game of minting money. The aristocratic ladies of his time were also indulging in the most expensive game of “dressing”. Ruskin satirically encodes their behaviour saying these are the “poor women” with no proper clothing. Had the garment-budget of these ladies distributed among the poor people of third world, it would have sufficed them to fulfill their basic needs. However, the distinction between work and play is not exclusively mutual; a single thing can be equally “work” and “play” according to its primary and secondary purposes.

Second Distinction

The writer draws another distinction between the rich and poor. The first spends a large amount of money even on cheap and ordinary things while the latter has to endeavor his basic needs.

Ruskin quotes two instances from a newspaper. The first says that in Russia a man of good fortune entered into a hotel to take his breakfast. He paid there fifteen francs only for two peaches. The second story states the miserable state of a dead person whose body was lying on a dung heap with no person paying any heed towards him only because he belongs to the poor class. Some dried pieces of “bones” were taken out of his pocket thus intensifying the misery of the poor person.

Lawful Bases of Wealth

The lawful basis of wealth is that a worker should be paid a fair amount of his work and he should also be given liberty regarding his money; whether spends or saves for some rainy day. After implementing this law in a true sense there would be no “poor person” except for those lazy people who stay at home lazily instead of doing some work. Such kind of poor are doubly poor; lacking not only worldly possessions but also the moral strength. Those who follow this law are real rich irrespective of money they have in their possessions.

False Base of Minting Money

Duty is the main thing that should be given priority. Those who cares more about their salary or fee than the work they have been assigned, though, can become rich but on the false basis. Ruskin critically refers to such kind of people terming them “uneducated class”, “inferior in intellect” and “coward”. At this point Ruskin has proved his philosophy by giving an analogy. He says the primary purpose of a soldier’s life must be to win battles. Similarly teaching goodness should be the sole purpose of a clergyman’s life. Both of these persons are paid well for their duties but that is at secondary level. If this becomes their primary objective then they would be “coward” and “stupid”.

Third distinction

Some people work with their hands while some other with their brains. There is rough work to be done, and rough men must do it. There is also gentle work to be done and gentle men must do it. Both works are important in that the maintenance of life depends on manual as well as mental work. Every person should do honestly his own job, mental or physical.

Nevertheless it is a true fact that the dignity of labour and hard work is recognized only by his own class. A man working in a quiet and serene room with everything comfortable is unlikely to be aware of the hardships of train-drivers who have to drive against cruel winds with no difference of day and night in their life.

The rough work is generally honest, real and useful whereas the gentle work often accompanies dishonesty and cheating. When both the works are worthily done the head’s is noble work and the hand’s is ignorable. Again Ruskin criticizes the rich class who persistently thinks of providing relief and comfort to the working class but do nothing practically.

The essay tells us that both kinds of work should be done properly but he problem surfaces when people don’t work willingly. The main reason of this attitude is they don’t know which work they can do better. This “will” can be promoted only when they select the appropriate profession in accordance with their ability. Ruskin says, “in order that a man may be happy, it is necessary that he should not only be capable of his work, but a good judge of his work”.

Wide Area Network (WAN)

Types and Characteristics of WANs

What is a WAN?

There are two prevailing definitions of a Wide Area Network (WAN). The book definition of a WAN is a network that spans large geographical locations, usually to interconnect multiple Local Area Networks (LANs). The practical definition of a WAN is a network that traverses a public network or commercial carrier, using one of several WAN technologies

What are its Main Components?

The main components for a WAN are routers, switches and modems. These components are described below in the hardware section.

CPE – Devices on the subscriber premises are called customer premises equipment (CPE).

The subscriber owns the CPE or leases the CPE from the service provider. A copper or fiber cable connects the CPE to the service provider’s nearest exchange or central office. This cabling is often called the local loop, or “last-mile”.

DTE/DCE – Devices that put data on the local loop are called data circuit-terminating equipment, or data communications equipment (DCE). The customer devices that pass the data to the DCE are called data terminal equipment (DTE). The DCE primarily provides an interface for the DTE into the communication link on the WAN cloud.

Hardware

In a WAN you will need various types of hardware components for it to function. The typical items of hardware that you will need in a WAN are:

Router – An electronic device that connects a local area network (LAN) to a wide area network (WAN) and handles the task of routing messages between the two networks. Operates at layer 3, and makes decisions using IP addresses.

Switch – A switch is a network device that selects a path or circuit for sending a unit of data to its next destination. Operates at layer 2, and uses MAC addresses to send data to correct destination.

Modem – Short for modulator/demodulator, a modem enables a computer to communicate with other computers over telephone lines. Operates at layer 1, where signals are converted from digital to analogue and vice versa for transmission and receiving.

Wan Standards

WANs operate within the OSI model using layer 1 and layer 2 levels. The data link layer and the physical layer. The physical layer protocols describe how to provide electrical, mechanical and functional connections to the services provided by the ISP. The data link layer defines how data is encapsulated for transmission to remote sites.

Encapsulation

Encapsulation is the wrapping of data in a particular protocol header. Remember that WANs operate at the physical layer and the data link layer of the osi model and that higher layer protocols such as IP are encapsulated when sent across the WAN link. Serial interfaces support a wide range of WAN encapsulation types, which must be manually specified. These types include SDLC, PPP, Frame delay etc. Regardless of WAN encapsulation used it must be identical on both sides of the point to point link.

Packet and Circuit Switching

Circuit switching and packet switching are both used in high-capacity networks.

The majority of switched networks today get data across the network

through packet switching.

Circuit-switching is more reliable than packet-switching. Circuit switching is old and expensive, packet switching is more modern.

General Routing Issues

What is a Routing Protocol?

A routing protocol is a protocol that specifies how routers communicate and exchange information on a network. Each router has prior knowledge of its immediate neighbours and knows the structure of the network topology. The routers know this because the routing protocol shares this information.

Protocol

RIP (Routing Information Protocol) was one of the most commonly uses protocols on internal networks. Routers use RIP to dynamically adapt changes to the network connections and communicate information about which networks routers can reach and the distance between them. RIP is sometimes said to stand for Rest in Pieces in reference to the reputation that RIP has for breaking unexpectedly and rendering a network unable to function.

Routing Algorithms

Distance Vector

This type of routing protocol requires that each router simply inform its neighbours of its routing table. The distance vector protocol is also known as the bellman-ford algorithm.

Link State

This type of routing protocol requires that each router maintain a partial map of the network. The link state algorithm is also know as Dijkstra’s algorithm.

IGRP

IGRP is a type of distance vector routing protocol invented by cisco used to exchange routing data in a autonomous system. Distance vector protocols measure distances and compare routes. Routers that use distance vector must send all or a portion of their routing table in a routing update message at regular intervals to each neighbour router.

Addressing and Routing

What does routing mean?

Routing is the process of deciding how to move packets from one network to another.

The directions also known as routes can be learned by a router using a routing protocol then the information is passed from router to router along the route of the destination.

IP Address’s

Every machine connected to the internet is assigned an IP address. An example of an IP address would be 192.168.0.1. IP addresses are displayed in decimal format to make it easier for humans to understand but computers communicate in binary form. The four numbers that separate an IP address are called Octets. Each position consists of eight bits. When added to together you get 32 bit address. The purpose of each octet in an IP address is to create classes of IP addresses that can be assigned within a network. There are three main classes that we deal with Class A, B and C. The octets of an IP address are split into two parts Network and Host. In a class A address the first octet is the network portion, this determines which network the computer belongs to, the last octets of the address are the hosts that belong to the network.

Sub netting

Sub netting allows you to create multiple networks within a class A, B or C address. The subnet address is the address used by your LAN. In a Class C network address you would have a subnet mask of 255.255.255.0. A subnet mask identifies which portion is network and which is host. For example 192.168.6.15 the first octet three octets are the Network address and the last octet being the host(Workstation). It is important to subnet a network because gateways need to forward packets to other LANS. By giving each NIC on the gateway an IP address and a Subnet mask it allows the gateways to route packets from LAN to LAN. Once the packet arrives at its destination, the gateway then uses the bits of the subnet portion of the IP address to decide which LAN to send the packets.

Circuit Switched Leased Lines

A circuit switched network is one that establishes a dedicated circuit (or channel) between nodes and terminals before the users may communicate. Here are some terminologies associated with a Circuit switched network.

Frame relay is a telecommunication service designed for cost-efficient data transmission between local area networks (LANs)

Basic rate interference is a service used by small business for internet connectivity. An ISDN BRI provides two 64 Kbps digital channels to the user.

Primary rate interface (PRI) is a telecommunications standard for carrying voice and data transmissions between two locations

All data and voice channels are ISDN and operate at 64kbit/s

Packet Switching

http://www.raduniversity.com/networks/2004/PacketSwitching/main.htm – _Toc80455261

Packet switching refers to protocols in which messages are broken up into small packets before they are sent. Each packet is then transmitted over the Internet. At the destination the packets are reassembled into the original message. Packet switching main difference from Circuit Switching is that that the communication lines are not dedicated to passing messages from the source to the destination. In Packet Switching, different messages can use the same network resources within the same time period.

http://en.wikipedia.org/wiki/Asynchronous_Transfer_Mode

Asynchronous Transfer Mode (ATM) is a cell relay, packet switching network and protocolwhich encodes data into small fixed-sized cells.

ISDN is used to carry voice, data, video and images across a telephone network. ISDN stands for integrated services Digital Network. Isdn also provides users with a 128kbps bandwidth. This is done through frame relay. Frame relay complements and provides a service between ISDN, which offers bandwidth at 128 Kbps and Asynchronous Transfer Mode which operates in somewhat similar fashion to frame relay but at speeds from 155.520 Mbps or 622.080 Mbps. Frame relay is based on the older X.25 packet switching technology and is used to transmit analogue signals such as telephone conversations.

PSDN stands for packet switched data network and is a data communication network. Packet switched networks do not establish a physical communication signal like the public telephone does (circuit switched network) Packets are sent on a fixed length basis and assigned with a source and a destination address. The packets then rely on the routers to read the address and route the packets through the network.

Mobile and Broadband Services

Digital Subscriber line(DSL) is mainly used to bring high bandwidth connections to homes and small business’s over a copper wire telephone line. This is can only be achieved if you stay within the range of the telephone exchange. DSL offers download rates of up to 6mbps allowing continuous transmission of video, audio and 3D effects. DSL is set to replace ISDN and compete with the cable modem in providing multimedia to homes. DSL works by connecting your telephone line to the telephone office over copper wires that are twisted together.

Asymmetric Digital Subscribers Line is most commonly used for home users. It provides a high download speed but a lower upload speed. Using ADSL, up to 6.1 megabits per second of data can be sent downstream and up to 640 Kbps upstream.

http://en.wikipedia.org/wiki/Symmetric_Digital_Subscriber_Line

Symmetric Digital Subscriber Line is a digital subcriber line which runs over one pair of copper wires. The main difference between ADSL and SDSL is the difference in upload and download speeds. SDSL allows the same upstream data rate and downstream data rate as ADSL upstream can be very slow.

[http://searchnetworking.techtarget.com/sDefinition/0],,sid7_gci558545,00.html

HDSL High bit-rate Digital Subscriber Line, one of the earliest forms of DSL, is used for wideband digital transmission within a corporate site and between the telephone company and a customer. The main characteristic of HDSL is that provides equal bandwidth in both directions.

IDSL is a system in which data is transmitted at 128 Kbps on a regular copper telephone line from a user to a destination using digital transmission.

The Local Loop enables operators to connect directly to the consumer via copper local loops and then add their own equipment to offer broadband and other services. This process involves operators accessing local exchange buildings to connect to a network of copper lines which connect them to homes and businesses. BT is an Example of a Local Exchange. The local loop connecting the telephone exchange to most subscribers is capable of carrying frequencies well beyond the 3.4 kHz upper limit.

Benefits of using DSL

DSL can provide virtually instantaneous transmission of voice, data and video over ordinary copper phone lines. A DSL connection can eliminate delays when waiting to download information and graphics from the Internet. It provides users with a cost effective high speed Internet connection. Another benefit is that a DSL connection is always on-line (like a LAN connection) with no waiting time for dialling or connecting.

There are now more than 10 million broadband connections in the UK. By December 2005 there were 9.792 million broadband connections in the UK and the average broadband take up rate during the three months to December was more than 70,000 per week.

Dog Health Concerns and Common Diseases

Dogs are truly man’s best friend. These loyal, loving, protective and playful creatures have served beside man for thousands of years with an undying and relentless devotion. It’s hard to repay such a service of love, commitment and duty. When put to the basics, we provide our dogs with shelter, healthy nutrition, exercise and friendship. However, a dog’s health and well-being sometimes goes beyond the basics, requiring an owner with an eye for disease risks and proper veterinary care.

If you’re a dog owner, you should make sure your animal sees a qualified veterinarian on a regular basis. The range of diseases, parasites and genetic conditions that dogs can succumb to is vast, so it’s important to keep up your pet’s vaccines, stick to regular check-ups and also know what to look for.

Keep reading to learn about some of the most dangerous and fatal diseases that can afflict your beloved pet along with effective prevention methods.

1. Canine Distemper Virus (CDV)

CDV attacks the respiratory, gastrointestinal and central nervous systems. The disease is contracted through contact with other infected dogs and can be fatal to both young and old dogs. Symptoms include vomiting, diarrhea, fever, shivering, redness around the eyes, loss of appetite, weight loss, seizures, thickened footpads, cough and a discharge from the nose. There is no specific treatment, but sometimes antibiotics can be effective. However, a vaccine exists and should always be administered.

2. Canine Adenovirus or Infectious Canine Hepatitis (ICH)

Infectious Canine Hepatitis (ICH) is an acute liver disease, and highly contagious. The virus is transmitted through bodily fluids like urine, eye or nose secretions. Young and old dogs can be affected by ICH, but puppies are at a higher risk. Symptoms include fever, loss of appetite, vomiting, jaundice and corneal edema, though a blood test is needed to make a final diagnosis. Many dogs recover, but it’s best to prevent ICH through a simple vaccination.

3. Para Influenza or Tracheobronchitis (aka Kennel Cough)

The common name for Tracheobronchitis is Kennel Cough because of its propensity for spreading in close quarters, such as in a boarding kennel. It’s highly contagious and attacks the dog’s upper respiratory system. Like bronchitis in humans, the symptoms are coughing, snorting, hacking and sometimes fever. Kennel Cough can be treated with antibiotics or prevented through vaccination.

4. Rabies

Rabies is not just a dog disease; it will affect all mammals that are not vaccinated against the disease. Rabies directly attacks the brain and the prognosis is often deadly. This common disease can be easily prevented through vaccination. In many states, vaccination for domestic pets is absolutely mandatory.

In short, keep your dog healthy by making sure it gets regular vaccinations. Almost all diseases are preventable.

What You Really Need to Know About a MPLS Network

MPLS… or Multi-Protocol Label Switching…. seems to be the buzzword for connecting company data networks these days. But MPLS is really nothing new. It’s been around awhile actually. Maybe now it’s just gaining more popularity and thus noticeable public acceptance and notoriety. Rightfully so too. MPLS offers lots of advantages over traditional T1 point-to-point WAN architectures.

But….. to decide if MPLS is really a good fit for your network requirements….. there’s some things you need to understand first.

There’s no one “MPLS Service”. A lot of what you get will depend how the service provider has Engineered and built their core network. Bear in mind that many carriers don’t own the whole network, but will piece together a service from other carriers networks, or will interconnect with other carriers to extend their reach.

Cell-mode MPLS was mentioned: basically this is ATM which has been retro-fitted with MPLS. Be careful with this for VoIP applications because it can use bandwidth very inefficiently.

MPLS can support QoS, but many services aren’t engineered with this, or only with very basic prioritization. Also the services are very often structured to reduce the potential complexity and to ensure the network can cope. Bear in mind a typical MPLS router can only carry a percentage of “high-priority, real time” traffic. If everyone sends all their data as high priority then the benefit is lost, and the network may suffer. Usually QoS is provided as a small number of service classes, typically 3 or 4.

The biggest bottleneck in any such service is normally the tail circuit to each of your premises. If you move from a T1 mesh to a MPLS service then you will likely find that some sites need more bandwidth than others. Tracking the requirement for this bandwidth is usually your problem, although the service provides may give you some reporting tools to assist with this. I would avoid service providers who cannot offer this as it will make it very difficult for you to manage your bandwidths.

If you factor in multiple service classes then your management of these tail circuits gets more complex as you no only have to work out how much bandwidth is required for each tail circuit, but how much of it should be reserved for each service class.

Regarding resilience, within the service providers core, the service is normally highly resilient to failures. However, when failures do occur, very often (depending on how the service is engineered) the rerouting can take a second or two. During this network re-convergence you will lose packets. Depending on the protocol your traffic uses this can be unimportant or devastating. For instance, some VPN and VoIP services don’t survive this well.

Normally resilience is not automatically provided all the way to the customer. Typically you will have one tail circuit and one router at each site. If either fails (or if the Service provider’s PE router has problems) you will lose service to the site, totally.

If this is an issue, you need to factor in dual connections. There’s multiple ways of doing this, and different service providers will offer different options. Make sure you get your Network Engineer involved as the devil is in the detail here, and some options which sound like they provide a fantastic level of resilience may not be as good as they sound, depending on how your internal network is configured.

And, of course, the key to all of this is SLAs: what do they offer? What happens if they break them? How do they report them to you?

Generally speaking, MPLS services are a great way to run a multi-site data network including VoIP services. I have seen many carriers and their customers doing this successfully for years.

Strictly speaking MPLS does not provide QoS. QoS is done by prioritizing traffic, and most IP routers, even those on the backbone of the Internet, can do this. The difference is whether they are configured to do this or not. In an MPLS network MPLS is provided by standard router features. MPLS technology (specifically Traffic Engineering) gives the carrier better control over how this traffic is prioritized and routed (and restored in case of network fault). All this does is give them the confidence to support SLAs.

As I mentioned, “QoS” is provided as a set of “service classes”. Typically these are things like “real-time”, “high-priority” and “everything else”. Mapping actual traffic into these classes can be done in a few different ways, but this is largely up to you to control. For instance, you could quite easily put web-browsing traffic into “real time” although this would normally be a dumb thing to do.

I would suggest the case for MPLS in terms of performance, cost and continuity against ‘traditional’ or ‘legacy’ data networks is now pretty robust, i.e. MPLS provides significant advantages in all 3 areas.

The key considerations when migrating include provider selection, access media (e.g. using Ethernet rather than SDH/SONET), the decision on procuring a managed or unmanaged service (often called wires-only) and the providers ability to map their CoS/QoS to the applications you need to support. This is especially important if you are operating any proprietary applications.

There is also an increasing trend to use WAN Optimization/application management solutions either as a value added service from the provider or from an alternative integrator or indeed doing it in house. This is important say for voice or applications such as CITRIX.

MPLS providers also now offer a whole suite of value added services such as integrated internet, managed network based firewalls and remote user support. If these are important to you make sure the providers demonstrate how this is achieved.

In selecting your provider ensure they have good geographic coverage in your areas and experience within your market segment. I always recommend requesting up to 3 references. Equally I think it is wise to understand how important a client you will be to the provider. It’s all well and good using the market leader (say according to Gartner)….. but you’ll often get a better service from a provider who values and really wants your business.

Need help designing the right MPLS configuration for your network? There’s a ton of resources….. free and fee….. listed and discussed at Broadband Nation.