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7/30/2019 Data communication.ppt
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By:Rakshith
SMVITM, Bantakal 1
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Contents
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Definition
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Modes of data transmission
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Parallel communication
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Serial communication
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Asynchronous communication
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Synchronous communication
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simplex
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Half-duplex
transmitter receiver
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Full-duplex
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Transmission media
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Guided(wire) media
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Twisted-pair wires
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Coaxial cable
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Optical fiber
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Unguided(wireless) media
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Network topology
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Mesh topology
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Star topology
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Tree topology
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Ring topology
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Bus topology
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Hybrid topology
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router
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SMVITM, Bantakal 27
Application
Presentation
Session
transport
Network
Data link
Physical
Application
Presentation
Session
transport
Network
Data link
Physical
Network
Data link
Physical
Source node Destination node
Intermediate node
Signals
Packets
Bits
Frames
OSI MODEL
O t i t ti
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Open systems interconnection
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Local area networks(LAN)
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Metropolitan area network(MAN)
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Wide area network(WAN)
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networking
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