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What are 10Base2, 10Base5 and 10BaseT Ethernet LANs

10Base2—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that
  uses baseband
  signaling, with a contiguous cable segment length of 100 meters and a maximum of 2 segments.
  10Base5—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that
  uses baseband
  signaling, with 5 continuous segments not exceeding 100 meters per segment.
  10BaseT—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that
  uses baseband
  signaling and twisted pair cabling.