Internet Terminologies in Brief

(1) TCP/IP Protocols and IP Address:
 In the roads we have traffic rules and signals so that many vehicles can use the same to reach to destination safe. Similar to traffic rules and signals; Protocols are also rules data communication.
 Various protocols of different standards at different layers of communication protocols play role during information(data) exchange which is the mere (or say most common) function/use of Network or it be internet.
 Among many different protocols suite TCP/IP is the protocols suites used by publicly accessible internet besides due to its many features its also commonly used in other networking standards as well like Ethernet.
 Every computer connected to the Internet has a unique address: a number whose format is defined by the Internet Protocol (IP), the standard that defines how messages are passed from one machine to another on the Net. Basically IP address of version 4 which is still in use though IPv6 is already launched, consists of 4 octets say (4x8=32 bits) each octet separated by periods, such as 192.12.221.2 or 131.56.3.1.
(Details of IP is beyond the scope of the class 9....)
Its hard to remember numbers so with help of DNS (Domain name system) each unique IP addressed is assigned with the names. So we use these IP address names in internet surfing. Fully qualified domain name of WWW (a internet application) looks something like http://www.facebook.com/, http://www.yahoo.com.in/, http://www.ntc.net.np/. Mainly 3 parts can be seen in the names, they are domain name like facebook, yahoo and ntc, another part if domain type .com, .net or .edu and finally (occasionaly) comes up with country suffix like .in for india, .np for nepal, .us for usa.

(2) Clients, Servers, and Browsers:
 Internet connects two kinds of computers: servers, which serve up documents, and clients, which retrieve and display documents for us humans in the context of internet. Things that happen on the server machine are said to be on the --server side--, while activities on the client machine occur --client side--.
Server side activies (say web sites/documents) are handled by the --web-server--, a software there in server machines. Clients uses --web browser--, a software in the client machines, to request web sites and display the fetched electronic documents --web pages-- of the web-site.
 Examples of Web-Servers are - Apache, Internet Information Service (IIS),   Reactor
 Example of Web-browers are - firebox, netscape navigate, opera, internet explorer
Still students may be able to grab the concept how data flows in the internet, or say how internet functions...
Actually its out of the course though understanding it in big-picture could be beneficial to the students.
More light on the mechanisms of how internet or WWW work will be put only on demand students... (Interactive class shall be arranged to figure out it).