Computer Network Technology

What is a computer network? A computer network is a set of computers, printers, and other devices that are connected to each other to share information and move data through cables. Many users can print with the same printer or use the same software at the same time. Computers that store primary data and act as data centers are called Servers, while computers that are connected to networks and retrieve data from Servers are called Workstations.

Various Networks

1. Local Area Network (LAN) A network that is limited by a small area usually used by a small office in a building or school. Usually not far from 1 km square. Most LANs use cables and LAN cards to connect one computer to another. Each computer that is connected to a LAN has a different Internet Protocol Address. Usually abbreviated as IP Address. LAN can also be set up through Wireless Technology which has speeds of 10 to 10,000 Mbps. Wireless LANs can use infrared or radio frequencies.

LAN Benefits

a. Sharing files and printers is easy between computers. b. The risk of data loss caused by a virus can be reduced. c. If there is one computer connected to the modem, all computers can access the internet. d. There is a lot of space in the storage system (hard disk) for storing documents. e. Files stored on the server can be accessed by client computers with authorization. Authorizations can be made according to the company’s organizational structure.

2. Metropolitan Area Network (MAN) This type of network usually has a larger area than a LAN or can contain networks from several LANs that are connected to each other. Example MAN is a network built on a broad campus complex.

3. Wide Area Network (WAN) WAN is a type of network that is usually built through satellite or submarine cable technology. An example of a WAN is a bank network in the capital city that can share information with the regional bank network. They can also hold video conferencing meetings via the Internet.

Advantages of WAN:

 a. We can send files or documents by electronic mail (email) instead of sending documents manually through the post office. b. The network server at the Head Office can be a data bank of a branch office. c. Company data can be updated every day as needed.…

An Eye Opener to Broadband Technology

Broadband refers to a high speed form of telecommunication ion which several frequencies are used to transmit information. The availability of a wide band of frequencies makes it possible to send large amounts of data through the various channels embedded within the band. This helps in saving a considerable amount of time.  A broadband connection has marked advantages over other forms of net access media like dial-up. Some of them are:

Gone are the days when you have to sit in front of your system for hours together to download a single document. Now with broadband technology you can get scores of data in a matter of minutes and seconds. Broadband speed is tons of times faster than other types of net connections especially dial-up.

How do you think all the gaming centers prosper these days, downloading complex, tricky games from the internet would not have been possible without broadband technology.

Previously with the dial-up net connections which were accessible through the phone lines, there was the disadvantage of keeping the phone engaged all the while the net was on. But broadband is available through a separate cable with no connection with your telephone line.

It provides ‘anytime access’ since you can leave it on for hours.

There are attractive packages offering unlimited access for reasonable rates.

Nowadays broadband technology also makes phone services possible through cheap VoIP technology.

All said and done broadband services are not without apparent faults. A look into some of the negatives:

Broadband connections can be more expensive than dial up in some cases, however when separate lines are used the costs can be offset.

Leaving your system with net access on all the time can make it more susceptible to hackers. You will have to create a personal firewall as protection.

Such connections may not be possible in remote areas.

You can see that the advantages outweigh the negatives; therefore broadband technology is undoubtedly a boon to today’s fast paced crowd.…

Do You Have the Right Hardware For Your PC?

Computers these days rely on sophisticated yet compact hardware. Computer hardware has improved over the years, and their prices are now affordable even for lay people. Without reliable PC hardware like motherboards, graphic cards, LAN cards, printers, mouse, and keyboards, the computer would not simply exist, as we know it today. Thus, it is essential that hardware is robust and reliable at the same time. Easy availability of hardware makes it straightforward for dealers to deal in hardware for the benefit of customers.

For those who do not understand computer hardware, these devices make your computer work. Briefly, computer hardware is essential for input, processing, or output functions, so your hardware engineer will install the right kind of hardware necessary for the related tasks you need to perform on the computer.

Also, computer hardware is essential to connect the gadgets like mouse, monitor, keyboards, speakers, drives, and printers, so that they can be used to execute the tasks of inputting data, processing data, and executing the output data. Without PC hardware, your computer is as good as a dud. It cannot do anything without these. With computers getting more sophisticated, the type of computer hardware that goes along with a modern day computer has become sophisticated too.

The numerous uses that the computer has been put into today have necessitated more processing power. Therefore, the main processors have become more number crunching too. The same can be said about other components like motherboards, hard drives, CD DVD drives, graphics cards, and others, which have evolved over time to suit present day computing needs.

With the increase in the utility of computers, PC hardware has become more intricate. For even average computer users, it is essential that they be aware of computer hardware and devices. Without a basic knowledge of these devices, it may be difficult to understand how a computer operates and to keep it up with the rapidly changing times.

With the increasing spotlight on recycling to counter the complex issue of global warming and environmental pollution, it is essential that you also recycle your old PC hardware while going in for replacements or new hardware. Modern computers consist of components made from rare earths and many elements that are hazardous to the environment. In this way, you will save the earth’s precious resources and do your bit to save the environment.…

Computer Basics – Purchasing a New Computer

If you are planning to buy a computer for your own purpose, it will pay you in more than one way to take some time out and know about the computer basics. Once you have a first hand idea about the computer basics by yourself, you will feel much better equipped in terms of selection and purchase of the computer.

The first thing you need to decide on is the type of computer – would you want a laptop or a desktop? Unless you have a job where you have to tour pretty regularly and also carry your computer with you during the tours, it is always advisable to opt for a desktop. The systems are relatively simpler with the desktops than the laptops, the latter being more sophisticated and more prone to malfunctioning. However, if you have extreme shortage of space at your home, in that case the laptop may be a wiser choice as it will never occupy a lot of space in your room. But, if you do not have any such constrain, it is always judicious to opt for the desktops.

Among the computer basics, the first thing that comes is the CPU – the Central Processing Unit. Often called the ‘brain of the computer’, the CPU is important for interpretation of whatever information the computer receives and to process all such data. It is this Central Processing Unit through which all other components of the computer are controlled and monitored.

Next in line in regards the computer basics comes the motherboard. System board, main board – these terms too are often used interchangeably with the more technical term – motherboard. If the CPU is the ‘brain’, then the motherboard is called the ‘heart of the computer.’ It is responsible for the primary circuit. All the important components of the computer – including the CPU, sounds and graphics cards, network cards, hard drives, etc. – are connected to it. There are several forms of motherboards. One of the very common types among them is the ATX.

RAM or the Random Access Memory forms yet another important thing in your idea about the computer basics. The RAM is the computer component that enables you to perform any task on the computer, be it running some program or processing some data, nothing can be done whatsoever without a proper RAM. The pace at which the past will be …

The Role of a Journalist in World News Today

It is a general fact that every journalist out there try’s to find the most relevant world news. But it certainly is hard to find one. It involves a number of factors. From media sources to the event and from asking questions to taking answers, everything has to be on time and properly planned. Therefore, it will not be wrong to state that it is difficult to find news rather than writing news. News topics change every day! Today you might be looking for news that talks about technology while tomorrow the hottest topic would be some celebrity news. It is for this reason that a journalist is valued so high in today’s society. Journalist is one whose role is an increased one from mere providing news. Now the journalists of all societies have turned to be social workers. They do not only highlight the issues but also provide suggestions and advises on the subject matter.

The increased role of these journalists cannot be overlooked in anyway. Now that we have come to know how important a journalist is for a society; I would like to share some quick while worth mentioning tips on How to find the latest news? If you are a journalist or are planning to go for this particular profession, you should be aware that this field is not limited to any particular idea. Therefore, your expertise should be based on generalized knowledge and not specialized. For instance; you should have knowledge to interview a sports icon as well as a politician. You should be aware of the code of conduct for both of them. This is one factor that has been troubling a lot of people out there. But I hope this is now clear now. Secondly, if you are out there to find news, you should start looking for common people instead of only celebrity stars or politicians.

The reason for this is that these days’ people prefer to talk about common people and are actually tired of all those political news and mess. In simple words, you might get a better audience while writing on common people subjects rather than trying to find high profile people. One of the news sources for this has been a news agency with the name of News World Wide. This news source is doing a fabulous job in regards of including the most common news of the …