VLAN trunking protocol is a way for two or more switches to communicate with each other, when the switches are connected in different VLANs.
A virtual LAN (VLAN) is a technique for isolating computers in a local area network (LAN) environment. A VLAN trunking protocol is used to interconnect two or more VLANs.
VLAN administration allows you to divide the network into smaller networks. It helps you to correctly track and monitor VLANs. When adding new VLANs, it's as simple as plugging them in. Consistency in VLAN setup across the network.
Trunking's major purpose is to transmit traffic across switches while also maintaining VLAN information. The trunk link, unlike an access link, is not bound to a single VLAN and can transmit traffic from many VLANs through a point-to-point link between two devices that support the protocol.
The VLAN Trunking Protocol was created by Cisco Systems in 1990s. It is a network protocol that defines how to carry data over trunks between multiple switches.
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