A computer network is a digital telecommunications network. It allows computing devices in sharing data with each other using data links between nodes. Network nodes are the network computer devices which originate, route and terminate data. Hosts such as phones, servers and personal computers, along with networking hardware like switches and routers can act as nodes. Computer networks can be formed by linking devices using a variety of transmission media such as radio waves, optical fiber and electrical cable. Networks are characterized by their organizational purpose as well as their physical capacity. A few examples of different types of networks are nanoscale network, local area network and wide area network. The topics included in this textbook on computer networking are of utmost significance and bound to provide incredible insights to readers. It covers in detail some existent theories and innovative concepts related to this field. Those in search of information to further their knowledge will be greatly assisted by this book.