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A computer network is a set of computers sharing resources located on or provided by network nodes. Computers use common communication protocols over digital interconnections to communicate with each other. These interconnections are made up of telecommunication network technologies based on physically wired, optical, and wireless radio-frequency methods that may be arranged in a variety of network topologies.
Computer networks may be classified by many criteria, including the transmission medium used to carry signals, bandwidth, communications protocols to organize network traffic, the network size, the topology, traffic control mechanisms, and organizational intent.[citation needed]
Computer networks support many applications and services, such as access to the World Wide Web, digital video and audio, shared use of application and storage servers, printers and fax machines, and use of email and instant messaging applications.
(Source: Wikipedia)
A typicalcomputer networks course covers these subjects : An Introduction to Networking Networking Standards and the OSI Model Transmission Basics and Networking Media Introduction to TCP/IP Protocols Topologies and Ethernet Standards Network Hardware WANs and Remote Connectivity Wireless Networking & More
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