Variant Types Of Computer Networks

A computer network is the practice of linking two or more computing devices together to exchange information. Networks are built with a mix of hardware
and software. This network is to share services and communicate via a communication link.

A computer network is very useful in a business. Most companies have over time more of a team and is often very beneficial to the network for all computers in the office. Local Area Network (LAN) equipment to your company. It’s about sharing and exchange different types of information as possible. If there are networks of computers, you hear these reasons.

There are different types of computer networks. A computer can be as simple as connecting two computers or a computer and a printer, or it can be very complex, connecting millions of computers and peripherals. Here is a list of different types of equipment.

The smallest type of network is a Personal Area Network (PAN). This type of computer network to connect a computer to a series of devices. These devices may include, but are not limited to, printers, PDAs and phones. Typically, these are very close to a computer. a Local Area Network (LAN) is a network of small geographical used. An example of this type is a computer network with two or more computers or computers that are connected to a workstation. A version of a LAN is a Wireless LAN (WLAN).

A Campus Area Network (CAN) is ideal for a university, but also occur in industrial plants. This type of computer network between computers in several buildings. This is usually used for bridging and routing. A Metropolitan Area Network (MAN) is a set of interconnected LANs and WANs, but will not extend certain restrictions, such as a city, town or city. Many of them operated in the public schools and used by companies and individuals in the region.

A Wide Area Network (WAN) is a step in a man what kind of computer network that crosses metropolitan or even national boundaries. The most popular WAN is the Internet. This computer network routers and public communications links used for data transport. Many WAN operated by private companies and limited, unlike the Internet. Although these species are the MAN network, computer users most of the other by the size of a Desk Area Network (DAN) on a very Large Global Area Network (GAN).

How Do Viruses And Worms Affect Your Computer

Also, unlike viruses that most commonly infect an individual computer, the worms usually attack a computer network. A computer network functions by using a collection of servers and routers. This is what the internet is comprised of. A server is like a PC but has more speed and storage and a router is a server with specialized functions, it directs traffic through the network.
PC Security – Worm Viruses, Deadliest of All

A virus attacks the unit used to run programs on the computer called the central processing unit or CPU for short. It does this by running programs and being constantly busy, so that none of the functions you select can be opened. Similarly, this is how a worm functions on a network. The routers rely on memory and processing time (similar to the CPU functions). These are attacked and as a result the network drastically slows down.

Worms carry payloads which are comprised of other types of malware, backdoor installations or spyware. Spyware is a monitoring program that can keep an eye on activities on your computer and backdoor programs set up hidden access points used by hackers to steal your information or send spam.

My Doom sent out at the beginning of 2004, was the fastest spreading worm to date. The worm came in the form of an email with the message “andy; I’m just doing my job, nothing personal, sorry.”

Although the culprit was never found, its intended victim is thought to have been a software company called Santa Cruz Operation or SCO for short.

When a person opened this email, the worm was programmed to overwhelm SCO’s website with traffic. The worm spread through the internet and caused a massive slow down.

For the individual computer, the worm’s payload is more serious because it allows ports to be opened on the computer where hackers have access to steal or delete information. In addition, a payload may come with a program to attack your antivirus software and disable it.

De worming

Using firewalls will help protect your computer. Firewalls reduce traffic and hide your computer. In this state, you are less likely to be attacked by worms spread over the network.

Be careful not to open suspicious emails and if you don’t know the person or get and unexpected email don’t open it. If you find your computer is slow and reboots by itself or the internet is sluggish, you may have been infected. Try running antivirus software to check it out. If that doesn’t work, try to manually removing the virus. Information as to how this is done can be found on the internet.

What is a Web Server

Mainly a web server is a sort of software which helps to view a website using the hypertext transfer protocol (HTTP). It is hardware i.e. the computer or a software i.e. the application delivering the internet accessed content. Many people think that it is a special computer as many computers are made as web servers keeping in mind to host website. In other way it is software which is installed to your PC.
Mostly web servers are used for hosting websites but for running business applications. Its main part is to deliver web pages as it gets the requests from the users. The users send its request using the HTTP and the server replies it with the content and if it is unavailable it gives an error message. The crucial function is to serve the content by implementing of HTTP and to receive the content from the users. There are many web servers supporting server side scripting like PHP and Apache.
The IT infrastructure management firms and other server support companies are also offering web server services to the users. The web servers are actually not always used to serve the World Wide Web. They are also used as an implanted part in devices such as routers, webcams, printers etc. Now the user can use it for monitoring purposes.
The web server has some defined load limits and a certain number of clients connections and a definite number of requests can be served. It depends on the settings, HTTP request type, content, limitations of OS of the hardware and software. There are various benefits of it within the development environment such as the local website appears to be like a live site, server scripting languages can also be used such as PHP and others, coding can be standardized, it can easily be understand how it works in the environment, the user will easily understand about the request or any issue.
There are many good features of the web browser like: Creating more than one website and no need to make set of pages.
You can configure the log file settings. You can create an FTP site to transfer and share data.
Creation of virtual directories. Configuring customized error pages.
According to the use the user should judge about what type of web hosting service he can use. Many types can be considered. Most of the providers offer the Linux based hosting offering different types of software. Web hosting services many times have a Web Content Management System and it helps the user not to worry about the technical concepts in depth.

Pc Enclosures Protecting Computers On Factory Floors

With the price of standard computers dropping, this puts computers in the reach of everyone, most homes have at least 1 computer and 1 laptop, with the low cost and availability businesses are now using them to monitor and control the production on factory floors.

However we all know that the standard computer is best suited in an air conditioned office, so as soon as they are introduced to factory floors that are dusty, dirty and full of grease, problems occur, with lost data and this can result in lost production time.

To combat this, some companies either build custom offices on the factory floor at a cost of thousands to have an area that is safe and free from relevant dust contamination or they purchase special industrial computer cabients that offer a safe protective environment for the computer to run without being effected by any dust, grime or fluid that is in the surrounding area. The computer enclosure is a more affordable solution, as it can be relocated if the production line is increased or reduced, were as the office would have to be demolished and rebuilt!

Industrial computer cabinets are cooled depending upon the application and the extreme temperatures, there are solutions to cool an enclosure to -30 degrees and there are solutions to heat the enclosure to +60 degrees Celsius. Air cooling units are also available, however they have moving parts than do wear out over time, there are options to maintain a ambient temperature inside the cabinet even if the external temperature range is to variable.

One solution to use in large temperature ranges, is a cooling tube, these run on compressed air and once fitted to the industrial computer cabinet, are set to the desired internal temperature, for example 20 degree Celsius and it does not effect the hardware if the external temperature drops to -20 degrees or 140 degrees Celsius, as the internal temperature is a steady 20 degree C. These cooling tubes have no moving parts, so there is nothing to wear out and they will certainly pay for themselves.

This is why many general manufacturers such as Ford Motors, Vauxhall, Paccar Trucks, and SCA Hygiene use computer enclosures, to protect their computer hardware and to help control production.

Protecting Networks Is Just a Game

ScienceDaily (July 28, 2011) – How can an organization detect the onset of an attack on its computer network giving it time to respond quickly and block any intrusion or compromise of its data? Modern firewalls and other technology are already in place, but these have not prevented major attacks on prominent networks in recent months. Now, information technologist Heechang Shin of Iona College in New Rochelle, NY, has used game theory to develop a defense mechanism for networks that is more effective than previous approaches. Writing in the International Journal of Business Continuity and Risk Management, Shin explains that with the tremendous growth in numbers of computing and other devices connected to networks, information systems security has become an issue of serious global concern. He points out that each incident might not only cause significant disruption to services affecting many thousands of people but for a commercial operation can take as much as 1 percent of annual sales, per incident. That number amounts to tens of millions of dollars for the average publicly listed company, Shin says.

Shin has now developed an effective anti-hacking tool based on a game theoretic model, called defensive forecasting, which can detect network intrusions in real time. The tool, by playing a “game” of reality versus forecast, wins when reality matches its forecast and it sends out an alert to block the intrusion.

Importantly, the tool works on real-time data flowing in and out of the network rather than analyzing logs, an approach that can only detect network intrusions after they have taken place. The game theoretic model continuously trains the tool so that it can recognize the patterns of typical network attacks: denial of service attacks, such as a syn flood, unauthorized access from remote machines in which login passwords are being guessed or brute-force tested, attacks by insiders with “superuser” or system root privileges or probing attacks in which software carries out surveillance or port scanning to find a way into the system.

In order to measure the effectiveness of the tool, Shin compared the approach using the semi-synthetic dataset generated from raw TCP/IP dump data by simulating a typical US Air Force LAN to a network intrusion system based on a support vector machine (SVM), which is considered one of the best classification methods for network intrusion detection. Experimental results show that the tool is as good as or better than the one based on SVM for detecting network intrusion while the tool adds the benefit of real-time detection.

For more information on CISSP, CISSP Prep Class, & CISSP Boot Camp visit Security University.

Samsung Galaxy S Enjoy Rain Of Beneficial Multimedia Features

To end shortage of buyers and earn big benefit, Samsung lunched a high end multimedia device that is known as Samsung galaxy s. In fact, Samsung has launched a complete range of capable multimedia handsets under galaxy.

In fact, Samsung galaxy s is a skillfull handset that caters at every step of life with fine multimedia features including including mega pixel camera, earnestly made display, highly configured multimedia player, great battery back up for longer service, nice multimedia player and many more. Thus, it does not show thumb down at any point of time.

To buy any of the handsets from galaxy range at affordable price, you do not need to pay hefty amount of money as all the top-notch service operators of United Kingdom including vodafone, virgin, orange, o2, three and t-mobile offer it at cheap price with lucrative mobile phone deals.

Two main devices in galaxy range are galaxy tab and galaxy s. Both the devices are finely made and you can go for any of choice. Samsung galaxy tab deals are best perfect to own galaxy tab. Whereas, Samsung galaxy s deals are most-suitable to own galaxy s. The best part of both the deals is those are easily available in market and you can buy with store of choice. If you are against market shopping as it demands hectic physical activities and long hours then go for online shopping.

There are numerous web portals available on internet which cater round the clock, free of cost. Thus, you can use anytime whenever feel easy. You will feel delighted to know that the process of online dealing is completely simple and you do not get in any kind of confusing trap. In case, you meet any doubt o confusion then take assistance from their trained customer care executives. On your request, their executives take immediate action and resolve as soon as possible.

Get Latest Updates On Samsung Galaxy S Deals and Other Offers Samsung Nexus S Deals in UK, Visit bestphoneshop.co.uk/

Play Latest Fighting Games Online

Online Fighting Games presents many types and forms. Its very interesting to play online free fighting games with the help of Internet connection. There is also a selection for online fighting games so you can play any type of fighting game according to your choice. As gaming has become an immeasurably popular activity for all age groups. Here you can see all kinds of free online fighting games such as sword fighting games, gun battles, treasure hunts, and many more. You can play them anytime according to your interest. Online fighting games are type of action game where two on-screen characters fight one-on-one. These kinds of games are very attractive and good looking to play online with family and friends.

There is difference between innovation and greatness. The Fighting Games genre you see whether 2D or 3D has always become very funny and interesting to play online. So people get more interest to play those funny and outstanding online fighting games. However, this does not mean that flash online fighting game is better and easier than the other games. As you see that a good fighter play very carefully and balance it very cleverly through step-by-step. A great fighter also has a various cast of characters with a unique and distinctive style. So the great fighter can easily and simply win the game by acting smartly. Online fighting games are almost exclusively comfort for all people. Playing fighting games is an amazingly fun, testing and you can also show your pure skills in front of another player while playing with him. Moreover, a couple of these fighting games had a tag team through which you can play team matches as well. As you can see that this is crazy fun to do and everyone can be a good fighter while playing these online fighting games for a long time. There are plenty of different types of fighters our there online you can play like solo, cartoons and realistic styles of fighting games without any doubt. You see some multiplayer fighters out there who are perfect in fighting games and they play very well. While seeing them, another people also want to become expert in fighting game. So, its not easy to become an expert and proficient in fighting games and its hard to find the perfect PC fighting games. You will see that people can be expert in fighting games like those who are free at home play all the time and those who are fond of games play each and every kind of game from starting. These days, everyone wants to be perfect in fighting games with the help of online fighting games. So, you can easily go and play the latest, interesting and exciting free online fighting games as soon as possible.

Advantages of Hiring Remote Computer Repair Services

Do you use computer or laptop in your office? If you are facing any major or minor problem in your laptop or computer, you are recommended to hire remote computer repair services. Before hiring a remote computer repair company, make sure that their technicians are well-qualified, certified and experienced in their remote computer repairing. Following are some major advantages of hiring remote computer repair services.

Most of remote computer repair companies can directly assist you particularly when you are highly dependent of on your computer or laptop. They will resolve all your computer or laptop related issues and you dont even to unplug a single cord of your system or fix them back to their right places. In this way, hiring a remote computer repair services is a great choice for you.

Their technicians will directly connect to your computer via remote desktop connection to fix your PC related issues. They specialize in fixing pc related issues because they are highly trained and have years of experience in resolving all major or minor computer-related issues. They are highly skilled in performing various methods of evaluation, operating, testing, system analysis and troubleshooting. They save you from the trouble of carrying your pc or laptop to the local computer repair shop and waiting for weeks to get it repaired.

The local computer repairmen will charge lost of fees, however you can avail the remote computer repair services from the very luxury of your own homes. The biggest advantage of hiring remote computer repair services is they will charge you only if your problem is resolved completely. In addition, they will also suggest you some tips for proper maintenance of your computer or laptop.

When you hire remote computer repair services, you dont to worry about the damages or accidents. Just suppose you are carrying your pc to the local computer repair shop. If you dont handle your pc properly while placing it in your car, chances are there that you can drop it. The same thing can happen when you carry your pc or laptop to home from the local computer repair shop. But when you hire the remote pc repair services, you dont need to worry about these issues.

You can call remote computer repair services anytime you need. Their services are available 24 hours a day and seven days a week. The best way to hire remote computer repair services is to search them online. SupportNerds dot com is one of the most affordable virus removal and remote computer repair services companies that you can hire to fix your computer or laptop related issues in a couple of hours.

Errors While Downloading Zip File With Internet Explorer 6

Though, Zip file format is a useful compression method, at the same time it is vulnerable to corruption, due to which you might come across an error message while trying to open the Zip file. Sometimes, you may receive an error message after downloading the Zip file with Internet Explorer. This happens if the HTTP compression is enabled for the .zip file The reason behind such behavior may be corruption of the Zip file, as a result of which the data stored in the Zip file may no more remain accessible to you. In order to access your data, you need to have a copy of a data backup file. But, in case you have not backed up your data, then the only way by which your data can be retrieved is by using a good-quality zip repair application.

Consider a scenario Sometimes, when you download a Zip file using Internet Explorer 6 and try to open the Zip file, the following error message appears:

The compressed (zipped) folder is invalid or corrupted.

After this error message, you will not be able to access the Zip file. Consequently, all the data that was stored in the Zip file becomes inaccessible. Furthermore, you will not be able to open the Zip file, no matter how many times you try to do so.

Cause:
The above mentioned error message occurs if the HTTP compression is enabled or activated for Zip files on the web server, from where the Zip file is downloaded. And if the HTTP compression is enabled on the web server, the Zip file gets encoded and then sent to Internet Explorer. When Internet Explorer receives the HTTP-compressed Zip file, then it is directly transferred to the program that is configured to un-zip the zip file without decoding the HTTP compression.

Resolution:
To resolve the issue, you need to repair zip file using a third-party application, known as zip repair software. These application are specially designed to resolve all the corruption issues associated with Zip file format. In addition, these tools are embedded with highly intuitive and innovative graphical user interface that makes them user-friendly and hence do no require any prior technical knowledge.

Nokia Lumia 710 For A Superb Multimedia Experience!

The Finnish mobile phone veteran is in recent months witnessing a reversal of fortunes. The launch of the Lumia series of smartphones has indeed made it possible for it to make the turn around. The UK mobile phone market, particularly has responded very positively to the Nokia Lumia 710 contract as well as the bigger cousin, the Nokia Lumia 800 for that matter.

You have one of the most functional and problem free smartphone handset when it comes to excessively brilliant multimedia phones. Besides the obvious charm of multimedia, the Lumia 710 has several other attributes that will most certainly make the potential buyer happy and nod in approval.

The Nokia Lumia 710 is a smartphone that is a shining example of the extremely positive outcome that has happened because of the association of Nokia with Microsoft. It is really surprising what big difference the presence of a more robust and vibrant operating platform can bring about in the fortunes of a falling company. Microsoft Windows Phone OS most certainly got the momentum going once again for Nokia. This version is also called the Mango.
Mango OS, powerful processor, fast web browsing you have it al here!

Besides the latest from Microsoft in the Microsoft Windows Phone version 7.0 of the operating system, you also have a powerful 1400 MHz Qualcomm MSM8255 (WCDMA) processor. This is a mighty enough combination of superlative software and hardware that any one in the mobile phone industry would love to provide in their respective handsets. Really, the outcome is beyond compare performance. Be it multi tasking or the quickness with which web pages download and close, or the efficacy with which you can work on more than a couple of E-mail accounts, and so on and so forth.

Nokia has also worked on the design aspect of the Lumia 710 and this shows. Affording a compact dimensions of 710 is 119 x 62.4 x 12.5 mm, the Nokia Lumia 710 weighs a very acceptable 126 gm. The device derives its power from the BP-3L 3.7V 1300 mAh battery.

The 3,7 inches wide Clear Black display touchscreen is something that you would not be able to take y our eyes off that easily. The TFT display is through the premius Corning Gorilla Glass and the resolution obtained is 480 x 800 pixels.
With just about everything starting from Google Search, Gmail, Yahoo Mail, YouTube, and Wikipedia available at your fingertips, you cannot but be happy with the net connectivity and data networking support offered.
The five mega pixel camera also more than does its job by returning crystal clear still images and high resolution video footage.

like facebook page and win prizes :-