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

Introduction. Basic concepts, historical overview.