Precautions of wireless networking

When you are trying to connect to a wireless network there are some precautions that you should take. Some of those precautions are you would not want to disable or delete your WEP key, because this connects you to your home internet. You would only delete that if you were sure you would never need to use your home internet again. You also would like to run your firewall software that is on your computer. Along with those you would like to make sure your laptop is set to not automatically connect with open networks.
Also with those precautions you want to unplug the connection if you are not using it. If you have two or more antennas you can disconnect all but one if you can connect with using just one. This are all helpful precautions that you should consider while connecting to a wireless network. By using these your computer will safely connect to wireless networks.

Internet and Networking

Computers have been used to coordinate information between multiple locations since the 1950s. The U.S. military's SAGE system was the first large-scale example of such a system, which led to a number of special-purpose commercial systems like Sabre.

In the 1970s, computer engineers at research institutions throughout the United States began to link their computers together using telecommunications technology. This effort was funded by ARPA (now DARPA), and the computer network that it produced was called the ARPANET.The technologies that made the Arpanet possible spread and evolved.

In time, the network spread beyond academic and military institutions and became known as the Internet. The emergence of networking involved a redefinition of the nature and boundaries of the computer. Computer operating systems and applications were modified to include the ability to define and access the resources of other computers on the network, such as peripheral devices, stored information, and the like, as extensions of the resources of an individual computer. Initially these facilities were available primarily to people working in high-tech environments, but in the 1990s the spread of applications like e-mail and the World Wide Web, combined with the development of cheap, fast networking technologies like Ethernet and ADSL saw computer networking become almost ubiquitous. In fact, the number of computers that are networked is growing phenomenally. A very large proportion of personal computers regularly connect to the Internet to communicate and receive information. "Wireless" networking, often utilizing mobile phone networks, has meant networking is becoming increasingly ubiquitous even in mobile computing environments.

Disadvantages of Internet

Internet also has many advantages besides the numerous advantages such as:

• Security risks
• Viruses
• Computer/Internet Literacy
• Wastage of Time
• Accuracy and authenticity of information
• Difficult filteration

Security risks:
Even though, the technology has become relatively safer place but still it is under constant threat by the hackers who can access any personal information and can use it for their advantage like the misuse of a credit card.

Viruses:
There are number of viruses on the internet which damages not only the computer software but also effects the hardware increasing the maintenance cost. The viruses spread global via internet within some hours, particularly when one downloads programs.

Computer/Internet Literacy:
As most of the information available on internet is in English language, people around the world who do not know English cannot benefit themselves from this facility. There are still many literate people around who have no awareness of how to benefit from internet.

Wastage of Time:
Instead of acquiring information or knowledge people waste time in chatting and surfing.

Accuracy and authenticity of information:
As there is lot of information on the internet related to any topic, it has become very difficult to authenticate the accuracy of that information.

Difficult filtration:
Due to the increase of web sites providing different information on a particular topic, it has become very difficult to filter out the information one specifically requires.

The "Guts" of the Web

Now that you know about the surface elements of the Web, what goes on beneath the surface? What are some of the elements that actually created the foundation for what you see on the Web? Read on to find out.

HTTP:
Hypertext Transfer Protocol, Protocol for accessing World Wide Web documents. It is the Primary access methods for interacting with the internet.

HTML:
Hypertext Markup Language. HTML is the coding language for the World Wide Web that informs browsers how to display a document's text, links, graphics, and other media. This language forms the foundation for all Web pages.

Webmaster:
The individual responsible for maintaining and updating the content of a World Wide Web document. Webmasters are the creative forces behind the World Wide Web.

Domain name:
The portion of the Internet address (URL) following the double forward slashes (//) that identifies an internet host site. Domain names are usually two or more terms separated by periods. Some examples are www.ucp.edu.pk and www.microsoft.com

Uniform Resource Locator (URL):
A URL serves as identification for all World Wide Web documents. It is an Internet address for locating Internet elements, such as server sites, documents, files, newsgroups and so on.

Internet Service Provider (ISP):
Internet Service Provider is a company that sells computer access to the internet. A user buys a subscription from an Internet Service Provider, which gives the user an identifying user name and Password and a Phone number. With his or her computer and modem, the user calls, connects to, and logs on to the service provider's computer. ISP also supports high speed dialup access, such as Digital Subscriber Line (DSL), cable modem, or a satellite, if available in the area

Internet

Internet
Definition:
Internet is a network made up of lots of interconnected networks. It is a wide area network. It is actually comprised of millions of independent networks at academic institutions, military installations, government agencies, commercial enterprises, internet support companies, and just about every other type of organization.

Explanation:
Most of the internet users use dialup connections to connect to internet. Dialup connection is established using a modem to dialup the number of the remote of the remote computer of Internet Service Provider (ISP).
Once the internet connection is established, now user can explore the wonders of internet. To do so user need an Internet Browser (e.g Internet explorer, Firefox or Netscape communicator)
Most of the information on the internet is accessed and viewed in the workspace of Internet Browser. User just has to type the Internet address of the desired site and that particular site will be opened in the browser window.
User can also accomplish a number of research tasks using the internet facility including:

• Browsing worldwide discussion groups on thousand of topics.
• Using electronic mail to get information from experts in response to your question.
• Connecting to libraries all over the world to locate materials in their collections, which may be borrowed through your library via interlibrary loan.
• Accessing information from local, state and federal government agencies.
• Accessing online, electronic journals and newspapers to find the latest news, reports and articles.

Uses of a computer

There are some uses of computer which are as follows:

• We can store data in a computer and retrieve stored data when we needed.
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  We can send messages to our friends, relatives and family anywhere in the world by connecting computer with internet.
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  Defense department of a country relies heavily on computer technologies such as surveillance, firing of missiles etc.
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  Computer technology can be used in performing different routine tasks in offices.
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  Computer can play a vital role in the advancement of science and technology.
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  Computers are very helpful in academic and vocational trainings.
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  Students can prepare their projects, assignments and research thesis by using this device.
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  Computer aided learning cannot replace the teacher but it helps the students to get training whenever and wherever they want.
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  Medical Sciences and biotechnology are using computers to diagnose the diseases of patients in hospitals.
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  Computers can be used for recreational purposes such as playing games etc.
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  Marketing applications help managers to analyze and develop strategies.
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  Computerized banking provides several benefits such as save the time and convenience for customer.