Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [R] [S] [T] [U] [V] [W] VCs PVCs CIR VCs (virtual circuits) vendor consortiums vendor-proprietary networking models 2nd viruses 2nd 3rd VLAN trunking VLANs creating 2nd 3rd frame forwarding 2nd reasons for implementing 2nd switch logic trunking 2nd 3rd 802.1Q ISL voice circuits voltage VPNs client software concentrators VPNs (virtual private networks) 2nd |