Passage: IEEE 802.1 working group defined this method of multiplexing VLANs in an effort to provide multivendor VLAN support. Kabla ya kuanzishwa kwa kiwango cha 802.1Q, itifaki kadhaa za wamiliki zilikuwepo, kama vile Cisco Inter-Switch Link (ISL) na 3Com's Virtual LAN Trunk (LTV). Cisco pia ilitekeleza VLANs juu ya FDDI kwa kubeba habari ya VLAN katika kichwa cha fremu ya IEEE 802.10, kinyume na kusudi la kiwango cha IEEE 802.10. Swali: Ni njia gani zilizotumiwa kabla ya kiwango cha 802.1Q?
Cisco Inter-Switch Link (ISL) na 3Com Virtual LAN Trunk (VLT)