Session 2 CN.pptx - Local Area Networks Metropolitan Area...

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Network Classifications Local Area Networks Metropolitan Area Networks Wide Area Networks Intranet Internet
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Local Area Networks A local area network (LAN) is a computer network covering a small geographic area, like a home, office, or Client Client Client Client Client Client
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Metropolitan Area Network (MAN) The communication infrastructures that have been developed in and around large cities
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Wide Area Networks (WANs) Wide Area Network (WAN) is a computer network that covers a broad area (i.e., any network whose communications links cross metropolitan, regional, or national boundaries). Or, less formally, a network that uses routers and public
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Intranet An intranet is a private network that is contained within an enterprise. It may consist of many interlinked local area networks and also use leased lines in the wide area network An intranet uses TCP/IP , HTTP , and other Internet protocols and in general looks like a private version of the Internet. With tunneling , companies can send private messages through the public network, using the public network with special encryption/decryption and other security safeguards to connect one part of their intranet to another.
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The Internet is the global system of interconnected computer networks that use the Internet protocol suite (TCP/IP) to link devices worldwide. It is a network of networks that consists of private, public, academic, business, and government networks of local to global scope, linked by a broad array of electronic, wireless, and optical networking technologies. Internet
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Open Systems Interconnection (OSI) Model International standard organization (ISO) established a committee in 1977 to develop an architecture for computer communication. Open Systems Interconnection (OSI) reference model is the result of this effort. In 1984, the Open Systems Interconnection (OSI) reference model was approved as an international standard for Term “open” denotes the ability to connect any two systems which conform to the reference model and associated standards.
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