MAC Layer I

1
MAC Layer I

• Throughput marginally better than Fast Ethernet
• Why?
• Uses a bigger slot size of 512 bytes to maintain
  Ethernet compliant. min/max frame sizes.
• Frame size remains but carrier event is
  extended.
• LLC is not aware of extension It is removed
  before the FCS is checked by receiver

2
MAC Layer II

• Increase Throughput Packet Bursting
• How?
• Pad first packet to the slot time (if necessary
  with carrier extension)
• Transmit subsequent packets back to back with
  minimum Inter-packet gap (IPG) until a burst
  timer (1500 bytes) expires.