Internet Principles Of Operation

Topics: Internet, IP address, World Wide Web Pages: 32 (2490 words) Published: December 14, 2014
 Computer Studies 2210
Submitted to :
Ma’am Shazia
Submitted by:
Maida Qadir, Hamayal Binte Ahmed, Huria Imtiaz, Fatima Batool Index

What is Internet…………………………………………………………………………………………………….3 Client/Server Architecture…………………………………………………………………………………….4 Web Client…………………………………………………………………………………………………………...6 Web Browser……………………………………………………………………………………………………….7 HTML……………………………………………………………………………………………………………………9 HTTP……………………………………………………………………………………………………………………11 Protocols…………………………………………………………………………………………………………….12 IP Addressing………………………………………………………………………………………………………14 MAC Addressing…………………………………………………………………………………………………16 Cookies………………………………………………………………………………………………………………..17 Internet Security Issues………………………………………………………………………………………19 Security Measures……………………………………………………………………………………………… 23

What is Internet?
What is the Internet? While it may seem like a simple question, defining the Internet isn’t easy. Because unlike any other technology, the Internet can be whatever we make it. We can shape it. We can mold it. But most importantly, we can use it to connect people, communities, and countries around the world. Internet may be defined as global computer network providing a variety of information and communication facilities, consisting of interconnected networks using standardized communication protocols. In the early days, most people just used the Internet to search for information. Today's Internet is a constantly evolving tool that not only contains an amazing variety of information but that also provides new ways of accessing, interacting, and connecting with people and content. As a result, new terms are constantly appearing. It is a network of networks that consists of millions of private, public, academic, business, and government networks, of local to global scope, that are linked by a broad array of electronic, wireless and optical networking technologies. Internet carries an extensive range of information resources and services, such as the inter-linked hypertext documents of the World Wide Web (WWW) and the infrastructure to support email

Client/Server Architecture

A network architecture in which each computer or process on the network is either a client or a server. Internet server (web server) is a special computer, on which websites are stored. Internet servers make the Internet possible. All of the machines on the Internet are either servers or clients. The machines that provide services to other machines are servers. And the machines that are used to connect to those services are clients. There are Web servers, e-mail servers, FTP servers and so on serving the needs of Internet users all over the world. When you connect to any website such as google.com to read a page, you are a user sitting at a client's machine. You are accessing the Google’s Web server. The server machine finds the page you requested and sends it to you. Clients that come to a server machine do so with a specific intent, so clients direct their requests to a specific software server running on the server machine. For example, if you are running a Web browser on your machine, it will want to talk to the Web server on the server machine, not the e-mail server. A server has a static IP address that does not change very often. A home machine that is dialing up through a modem, on the other hand, typically has an IP address assigned by the ISP every time you dial in. That IP address is unique for your session -- it may be different the next time you dial in. This way, an ISP only needs one IP address for each modem it supports, rather than one for each customer.

Web Client
Web client is a computer, on which user actually works. It has web browser to locate, retrieve and display contents on web servers. The user logs onto a client computer which then connects to the server, verifies the user and then allows them access to the files stored on the...
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