What is the Network
Network is a group of connected two or more systems sharing the resources and communicate to each other by the means of shard communication link. A Network requires two or more individual system with something to share and the system must be connecting through the communication media. All the system must follow the physical rules to communicate to each other that are known as the Protocols. So we can say a Network must have the following-
1. Something to share
2. Transmission medium
3. Rules of communication (Protocol)
The goal of networking is not a simply to exchange the data but also able to understand and use the data receive from other network. Network allow user to share resources it can be hardware like printer or modem and software like database application.
The first point is ‘something to share’ means the data which the sender wants to send at the destination point. Second thing is ‘Transmission medium’ means the medium through which we send our data from source to the destination. It may be copper wire,fibre optics and wireless and the third point is ‘Protocol’ it is a set of rule that are use to communicate two individual system having same network or different and the organization that standardized networking protocol are Institute of Electrical and Electronics Engineering (IEEE) and the Internet Engineering Task Force(IETF).
Example of the use of Protocol in Network communication is interaction between Web browser and the Web server. This communication uses number of protocol and standard in the process of exchanging information between them.
There are different types of protocol exits in the OSI Model like –Hypertext transfer Protocol (HTTP), Transmission Control Protocol (TCP), Internet Protocol (IP)-This is the most common protocol, it is responsible for taking the segment from the TCP, encapsulating them into packets, assign the appropriate address, select the best path towards the destination. The other protocol is Network Access Protocol –This describes the two functions. The first one is Data link management and the second is Physical Transmission.
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