100BASEVG
\wˈɒnhˈʌndɹəd bˈe͡ɪs vˌiːd͡ʒˈiː], \wˈɒnhˈʌndɹəd bˈeɪs vˌiːdʒˈiː], \w_ˈɒ_n_h_ˈʌ_n_d_ɹ_ə_d b_ˈeɪ_s v_ˌiː_dʒ_ˈiː]\
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A 100 MBps Ethernet standard specified to runover four pairs of category 3 UTP wires (known as voicegrade, hence the "VG"). It is also called 100VG-AnyLANbecause it was defined to carry both Ethernet and tokenring 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 FastEthernet. One faction wanted to keep CSMA/CD in order tokeep it pure Ethernet, even though the collision domainproblem limited the distances to one tenth that of 10baseT.Another faction wanted to change to a polling architecturefrom the hub (they called it "demand priority") in order tomaintain the 10baseT distances, and also to make it adeterministic protocol. The CSMA/CD crowd said, "This is802.3 -- the Ethernet committee. If you guys want to make adifferent protocol, form your own committee". The IEEE 802.12committee was thus formed and standardised 100BaseVG. Therest is history.
By Denis Howe
Word of the day
Proto Oncogene Proteins c erbB 2
- cell surface protein-tyrosine kinase that is found to be overexpressed in significant number adenocarcinomas. It has extensive homology can heterodimerize EGF EPIDERMAL GROWTH FACTOR), 3 receptor (RECEPTOR, 3) and the 4 receptor. Activation of erbB-2 receptor occurs during heterodimer formation with a ligand-bound erbB family members. EC 2.7.11.-.