Thursday, 8 December 2011

VLAN Trunking Protocol (VTP)


VLAN Trunking Protocol (VTPis a Cisco Own  protocol , Virtual Local Area Networks on the  local area network. Transfer VLAN information to  the connected switches in a VTP  advertisements sent over ISL, 802.1q, IEEE 802.10 and LANE trunks. VTP is Available on most domain of the Cisco Catalyst Family products.
Three Types:
1)Client mode : In this mode dont add and remove Vlan. It has no dabase means dont save.
2)Trnsperent mode :In this mode we add and remove vlan but only localy not in domain. It has save vlan only locally not in domain.
3)server mode :In this mode add and delete vlan in VTP domain. And also save vlan in domain.


802.11 Lineup
 802.11B
-Official as of September 1999
-Frequency 2.4GHZ
-Up to 11 MBPS (1, 2, 5.5, 11 Data rates)
-Most popular standard
-3 clean channels
802.11G
-Official as of June 2003
-Frequency 2.4GHZ
-Backards compatible with 802.11B
-Up to 54 MBPS (12 Data rates)
-3 clean channels
802.11A
-Official as of September 1999
-Frequency 5.8GHZ
-Up to 54 MBPS
-Not compatible with 802.11B/G
-12 to 23 clean channels
802.11N
-Up to 100 MbPS
-MIMO (multiple input multiple output)

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