A network is a connected collection of devices and end systems, such as computers and servers that can communicate with each other. A computer network interconnect is the glue which links devices together. Interconnect come in many forms and support several different kinds of networking. To understand how network functions by introducing fundamental computer and network concepts and the characteristics, functions, benefits, metrics, and attributes are used to describe network features and performance. An efficient and easy use of communication network management system is of great advantage.