Basic HTML version of Foils prepared Dec. 6 98

Foil 17 LAN switching (2)

From Introduction to Network Security Lectures at Xi'an Jaotong University -- Sept 1998. by Roman Markowski
1 LAN switch supports:
  • full-duplex communication: effectively doubles the throughput
  • media-rate adaptation : translation between 10 and 100 Mbps
  • dedicated collision-free communication between network devices
  • multiple simultaneous conversation: forwarding or switching
  • several packets at the same time
2 LAN switch forwarding
  • store-and-forward :error checking is performed (cyclic redundancy check); errorous frames are discarded
  • cut-through: latency is reduced by eliminating error checking; only the destination address is copied into the on-board buffers
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