What is HTML ?

Hypertext Markup Language (HTML) is a language for creating static web pages.

What is World Wide Web ?

World Wide Web is a repository of information spread all over the world and linked together.It is a unique combination of flexibility,portability,and user-friendly features .The World Wide Web today is a distributed client-server service,in which a client using a browser can access a service using a server.The service provided is distributed over many locations called web sites.

What is URL ?

It is a standard for specifying any kind of information on the World Wide Web.

What is Hypertext Transfer Protocol(HTTP) ?

It is the main protocol used to access data on the World Wide Web .the protocol transfers data in the form of plain text,hypertext,audio,video,and so on. It is so called because its efficiency allows its use in a hypertext environment where there are rapid jumps from one document to another.

What do you mean by Simple Mail Transfer Protocol ?

The TCP/IP protocol that supports electronic mail on the internet is called Simple Mail Transfer Protocol.SMTP provides for mail exchange between users on the same or different computer and supports Sending a single message to one or more recipient Sending message that include text, voice,video,or graphics.Sending message to users on network outside the internet.

What is Network Virtual Terminal ?

A universal interface provided by TELNET is called Network Virtual Terminal(NVT) character set.Via this interface TELNET translates characters (data or command) that come from local terminal into NVT form and delivers them to the network.

What do you mean by local login and remote login ?

When a user logs into a local time-sharing system ,it is called local login. When a user wants to access an application program or utility located on a remote machine,he or she performs remote login.

What is TELNET ?

TELNET is a client –server application that allows a user to log on to a remote machine,giving the user access to the remote system. TELNET is an abbreviation of terminal Network.

What is domain name system(DNS)?

Domain Name System (DNS )is a client server application that identifies each host on the internet with a unique user friendly name.

What are the information that a computer attached to a TCP/IP internet must possesses ?

Each computer attached to TCP/IP must possesses the following information

• Its IP addesss.

• Its subnet mask.

• The IP addesss of the router.

• The Ip address of the name server.

What do you mean by client server model ?

In client server model ,the client runs a program to request a service and the server runs a program to provide the service.These two programs communicate with each other. One server program can provide services to many client programs.

Define IP ?

Internetwork protocol (IP) is the transmission mechanism used by TCP/IP protocol.It is an unreliable and connectionless datagram protocol.It provides no error checking and tracking.

Define UDP ?

It is unreliable connectionless protocol.It is used for one-shot,client-server type,requesr- reply queries and applications in which prompt delivery is required than accuracy.

Define TCP ?

It is connection oriented protocol.It consist byte streams oeiginating on one machine to be delivered without error on any other machine in the network.while transmitting it fragments the stream to discrete messages and passes to internet layer.At the destination it reassembles the messages into output stream.

What are the protocols in transport layer ?

The protocols defined in transport layer are

• TCP

• UDP

What are the protocols in application layer ?

The protocols defined in application layer are

• TELNET

• FTP

• SMTP

• DNS

What are the design issue of layers ?

The design issue of layer are

• Addressing technique.ie source and destination address

• Types of communication

• Error control

• Order of message.

• Speed matching

• Multiplexing and demultiplexing.