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Data Communication is exchange of data between two devices. In computers data exchange is in form of 0 and 1. This course discuss how computer communicate, what is medium and what are expenses. This handout includes: Internet, Connecting, Devices, Metworking, Internetworking, Bridges, Repeaters, Gateways. Routers
Typology: Study notes
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o An internet is a generic term used to mean an interconnection of individual networks o To create an internet, we need networking devices called routers and gateways o An internet is different from the Internet o Internet is the name of a specific worldwide network
Connecting devices (Figure-1)
Connecting devices (Figure-2)
Repeaters (Figure-1)
o A repeater allows us to extend only the physical length of a network o Repeater is a regenerator, not an amplifier Repeaters (Figure-2)
Repeaters (Figure-3)
Routers
Routers relay packets among multiple interconnection networks
o Transmission Control Protocol/ Internet Protocol o 1969 o ARPA(Advanced Research Project Agency) net
