Some of the most commonly used terms with repect to the web are:

• Browser: This is a client software that allows the user to display and interact with a hypertext document.

• Web Server: This is a program that responds to request from Web browsers to retreive resources. It also used to refer to the computer that runs the server program.
  

• Web Site: This is collection of related files. Each Web site contain a home page, which is the first document that is displayed on the browser. A site might also contain additional documents and files. A site is owned and manage by an individual, company or organization/

• Home Page: This is first hypertext document (in HTML) that is displayed when the user opens a Web site. It contains links to other page or other sites.

• HTML (Hypertext Markup Language): This is the formating language used to present a Web document.

• HTTP (Hypertext Resourcer Locator): This is the protocol used on the Web to transfer hypertext documents.

• URL (Uniform Resource Locator): This is a Web addressing schema that spells out the exact location of a net resource on the Internet. Most URLs take the form:

protocol://host.domain/directory/filename

Internet Protocols

For effective communication, computers need to follow a set of rules known as protocols. Consider an example of how two people communicate with each other over the telephone. Smilarly, computers follow rules or protocols to communicate. Internet protocols are rules to communicate over the internet. Some of the protocols are:

• Transmission Control Protocol (TCP): Establishes a connection between computers before the transmission of data. It breaks the data into small packets and guarantees the transmission of data. TCP is a connection-oriented protocol.

• User Datagram Protocol (UDP): Enables fast but unreliable connectionless data transfers betweem the computers. UDP provides very few services for error recovery and is used mainly for sending the messages to multiple recipients on a network.

• Internet Protocol (IP): Routes data packets across the Internet. The process of dermining the correct path for data packets and transmitting them from one network to another is called routing. IP can route data packets because every network on the Internet has a unique network address. IP is a connectionless protocol.

• Internet Control Message Protocol (ICMP): Handles error and control messages.

• HTTP: Enables the exchange of information across the internet.

• The file Transfer Protocol(FTP) Allows the transfer of files on the Internet.

• Simpel Mail Transfer Protocol (SMTP): Enables sending e-mail messages on the Internet.

• Post Office Protocol (POP3): Enables receiving e-mail messages on the Internet.

• Internet Messages Access Protocol (IMAP) : Enables access to the e-mail messages kept on a mail server.

• Wireless Application Protocol (WAP): Provides exchange of information over wireless devices, such as mobile phone and Personal Digital Assistants.