INTERNET

 Internet

               •It is the largest network in the world that connects      hundreds of thousands of individual networks all over the world.

•        The popular term for the Internet is the “information highway”.

•       Rather than moving through geographical space, it moves your ideas and information through cyberspace – the space of electronic movement of ideas and information.

 

•No one owns it

•It has no formal management  

 organization. 

•As it was originally developed by the 

 Department of defense, this lack of 

 centralization made it less vulnerable to

 wartime or terrorist attacks.

•To access the Internet, an existing 

 network need to pay a small registration 

fee and agree to certain standards  

based on the TCP/IP (Transmission

 Control Protocol/Internet Protocol)

Uses of internet

 

•Send e-mail messages.

•Send (upload) or receive (down load) files between computers.

•Participate in discussion groups, such as mailing lists and newsgroups.

•Surfing the web.

        WEB

•     The  consists of information organized into Web pages containing text and graphic images.

      •It contains hypertext links, or highlighted keywords and images that lead to related information.

•       A collection of linked Web pages that has a common theme or focus is called a Web site.

•The main page that all of the pages on a particular Web site are organized around and link back to is called the site’s home page.

How internet access

•Many schools and businesses 

have direct access to the 

Internet using special 

high-speed communication

lines and equipment.

•Students and employees can 

access through the 

organization’s local area

networks (LAN) or through

their own personal computers.

•Another way to access the

 Internet is through Internet 

 Service Provider (ISP).

  

            Domain name

•Most web browsers do not use the 

IP address t locate Web sites and 

individual pages.

•They use domain name addressing.

•A domain name is a unique name 

associated with a specific IP address 

by a program that runs on an 

Internet host computer.

•This program, which coordinates 

the IP addresses and domain names

 for all computers attached to it, is 

called DNS (Domain Name Syste ) 

software.

•The host computer that runs this

  software is called a domain name

 server.

How to find information on the 

web

•You can find information by two 

basic means.

•Search by Topic and Search by 

keywords.

•Some search services offer both

 methods, others only one.

•Yahoo offers both.

Search by Topic 

  You can navigate through topic

   lists

Search by keywords

  You can navigate by entering a

  keyword or phase into a search 

  text box.