Computer network is a group of computers linked together, so that they can share information and resources. Internet is “network of networks”. It can also be described as information highway. It is the world’s largest network of computers. The networks are related to academics, research, government and include users of all types of profiles i.e., corporate, individuals, professionals, children, schools, institutes etc. It may be remembered that computer is not located at a single site, not controlled by any central authority. The networking in the internet are not directly connected but interconnected. The ability to graphically access internet resources throughout the web is the primary reason for the phenomenal growth of the internet.
Client and Server:
The term client and server is also main part of the network. Client means those computers which send the requests to the server computer for any required information. The server system receives the clients request and sends the appropriate information to the client computer.
TCP (Transmission Control Protocol) and IP (Internet Protocol) are the two types of protocol. A protocol is defined as a set of standard rules that lets communication between computers take place. The first one TCP (Transmission Control Protocol) is a reliable, connection –oriented protocol that allows stream of bytes from the sender to be delivered to the receiver without error. This is the protocol of the transport layer.
The internet layer defines a protocol called IP (Internet Protocol) to specify an official packet format. Its job is to deliver IP packets to the destination.
The TCP/IP model has five layers
- Data link
Some Protocols and Networks in TCP/IP model