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Protocol Layering and Layering Models. Protocol Layering d Needed because communication is complex d Intended primarily for protocol designers
computer network can be defined as the collection of computers, printers, and other equipment that are connected (wired or wireless), with the ultimate aim of fostering communications between the devices.
An Introduction to Computer Networks is a free and open general-purpose computer-networking textbook, complete with diagrams and exercises.It covers the LAN, internetworking and transport layers, focusing primarily on TCP/IP.
This book tries to use a systematic view to explain the computer network by focusing on several major components in the Internet, so several topics have to be grouped together. For example, "Internetworking" section, it covers switch, Ethernet, IP, and outing.
This lesson covered the following main topics: The function and operation of a hub, a switch, and a router. The function and operation of Layer 2 switching, Layer 3 switching, and routing. The OSI model. Functionality of LAN, MAN and WAN networks.
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Computer networks have used various types of physical media to exchange information, notably : • electrical cable. Information can be transmitted over different types of electrical cables. The most common ones are the twisted pairs (that are used in the telephone network, but also in enterprise networks) and the coaxial