6 - Networks

6 - Networks - NetworkingandDigital Communication Slide 1...

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Networking and Digital  Communication  Slide 1
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Basic Network Anatomy A computer network is any system of two or more computers that are linked together. Slide 2 How is networking important? People share computer hardware, thus reducing costs. People share data and software programs, thus increasing efficiency and production. People work together in ways that are otherwise difficult or impossible.
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Basic Network Anatomy In a  local area network  (LAN) computers are  physically close to each other, usually in the same  building. Computers are linked within a building or  cluster of buildings. Each computer and peripheral is an   individual node on the network. Nodes are connected by cables, which may be  either twisted pair (copper wires) or coaxial cable. Most computers use Ethernet cables and ports In a  wireless network  each node has a tiny radio  transmitter connected to its network port.  Computers send and receive data through the air  Slide 3
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Basic Network Anatomy metropolitan area network   (MAN) links two or more  LANs within a city. wide area network  (WAN) extends over a long  distance. Each networked LAN site is a node on the WAN. Data transmitted over common pathways called a  backbone. Slide 4
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Basic Network Anatomy Communication frequently happens between  LANs and WANs Routers hardware devices or software programs that route  messages as they travel between networks Mesh networks an alternative to today’s networks; rely on  centralized routers Used to set up small, temporary communication  systems Example: emergency personnel use at fire scenes  to coordinate actions  Slide 5
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Positioning System (GPS) GPS is a specialized network developed by  U.S. Department of Defense. It includes 24 satellites that circle the Earth. Each satellite contains a computer, an  atomic clock, and a radio. On the ground, a GPS receiver can use 
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6 - Networks - NetworkingandDigital Communication Slide 1...

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