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Local Area High Speed Networks by Dr. Sidnie Feit

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Summary Points

  • Although LANs originally were truly local, today a LAN can span acampus or can include multiple sites.

  • A LAN operates at the physical and data link layers.

  • Cables, communicating computers, repeaters/hubs, and bridges/switches all are LAN components.

  • An Ethernet collision domain is made up of end systems, cable segments, repeaters, and hubs. Only one frame can be in transit across a collision domain at any given time.

  • The Ethernet Carrier Sense Multiple Access with Collision Detection (CSMA/CD) media access protocol is used on a collision domain. CSMA/CD also is called half-duplex Ethernet communication.

  • Bridges and switches increase a LAN's transmission capacity by breaking an Ethernet LAN into multiple collision domains.

  • The change ...

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