Nkọwa: Usoro a na-ejikarị eme ihe taa iji kwado VLANs bụ IEEE 802.1Q. IEEE 802.1 na-arụ ọrụ na-akọwa usoro a nke multiplexing VLANs na mgbalị iji nye nkwado VLAN ọtụtụ. Tupu iwebata nke 802.1Q ọkọlọtọ, ọtụtụ protocols proprietary dị, dị ka Cisco Inter-Switch Link (ISL) na 3Com's Virtual LAN Trunk (LTV). Cisco na-emejuputa VLANs n'elu FDDI site na-ebu ozi VLAN na IEEE 802.10 etiti nkụnye eji isi mee, na-emegide nzube nke IEEE 802.10 ọkọlọtọ. Ajụjụ: Olee ụzọ ndị e ji mee ihe tupu 802.1Q ọkọlọtọ?
Cisco Inter-Switch Link (ISL) na 3Com's Virtual LAN Trunk (VLT)