• Anuj Kumar Bharti

In computer network system are interconnected with each other for the purpose of sharing digital information. Computer Networks is basically a set of devices connected through links. Computer Network uses distributed processing in which task is divided among several computers. One of the most significant challenges to networks is to attack on their resources. This research paper highlights the concept of computer networks. Computer network is a set of devices which is connected through links. Nodes can include hosts in personal computers, phones, servers as well as networking hardware. Computer networks support applications access to the World Wide Web, shared use of application and storages servers, printers, and fax machines, and use of email and instant messaging applications. Computer networks are used to perform a great number of tasks by information sharing. There are two types of system open system and closed system. Open system can be easy connected to the network and prepared for communication. On the other hand closed system is not easily connected with other network as proper authentication is needed.

Computer networks, Protocols, Types of networks, Topology, Nodes, Data transfer.

"A Research Paper on Basic of Computer Network", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.511-516, March-2019, Available :http://www.jetir.org/papers/JETIREO06117.pdf

"A Research Paper on Basic of Computer Network", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp511-516, March-2019, Available at : http://www.jetir.org/papers/JETIREO06117.pdf