Introduction. Basic concepts, historical overview.

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What is PAN?
kezdjen tanulni
Personal Area Network, Nearest neighborhood, < 1 m
What is LAN?
kezdjen tanulni
Local Area Network, Room building areal, 10m 100m 1km
What is MAN?
kezdjen tanulni
Metropolitan Network, Town City Country, 10km 100km 1000km
What is WAN?
kezdjen tanulni
Wide Area Network, Continent, 1000km
What node roles are there?
kezdjen tanulni
peer-to-peer, client-server, master-slave
What mediums are there for networks to travel?
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Metalic, optics, wireless
What mode of transportation are there for data networks?
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Connection oriented (Circuits), Connectionless (packets)
What data networks architectures are there?
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ISO/OSI, TCP/IP, X. 25 and so on
What’s a network architecture?
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Method of communication and definition of the set of used protocols and layers
Whats‘s network topology?
kezdjen tanulni
Way of interconnection of elements in the network
Examples of topologies?
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Bus, ring, star, extended star, hierarchical, mesh
Why is network architecture useful?
kezdjen tanulni
Implementation if the network at all is too complicated, so we decompose the problem into smaller parts (layers)

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