100basevg

1 definition found

100basevg - Free On-line Dictionary of Computing (26 May 2007) :

  100BaseVG
  100VG-AnyLAN
  
     <networking> A 100 MBps Ethernet standard specified to run
     over four pairs of category 3 UTP wires (known as voice
     grade, hence the "VG").  It is also called 100VG-AnyLAN
     because it was defined to carry both Ethernet and token ring
      frame types.
  
     100BaseVG was originally proposed by Hewlett-Packard,
     ratified by the ISO in 1995 and practically extinct by 1998.
  
     100BaseVG started in the IEEE 802.3u committee as Fast Ethernet
     .  One faction wanted to keep CSMA/CD in order to
     keep it pure Ethernet, even though the collision domain
     problem limited the distances to one tenth that of 10baseT.
     Another faction wanted to change to a polling architecture
     from the hub (they called it "demand priority") in order to
     maintain the 10baseT distances, and also to make it a
     deterministic protocol.  The CSMA/CD crowd said, "This is
     802.3 -- the Ethernet committee.  If you guys want to make a
     different protocol, form your own committee".  The IEEE 802.12
     committee was thus formed and standardised 100BaseVG.  The
     rest is history.
  
     (1998-06-30)