Bitmindframes cisco study guides.
TRUNKING
Trunking is Point to point link from a switch to a router or a switch. A trunk link can carry traffic from multiple vlans over a single link allowing vlans to span internetworks.
Cisco supports IEEE 802.1Q trunking on 100/1000 ethernet
What does trunking solve?
Without trunking switches & routers have to be interconnected with a separate link for each VLAN. 4 VLANs require 4 links connecting switches S1 & S2 leaving fewer ports for devices. If S2 was connected to S1 it would be more than 4 ports.
