Question

You have enabled LAG on a WLC that contains eight distribution system ports. Which of the following is true?

a. By default, LAG will be enabled on all eight ports.
b. By default, LAG will be enabled only on one physical port.
c. By default, LAG will aggregate all ports by using the LACP protocol.
d. By default, LAG will aggregate all ports by using PAgP protocol.
e. By default, LAG will cause each port to trunk independently of the others.

Answer 1

By default, LAG will aggregate all ports by using PAgP protocol.

Step-by-step explanation:

The correct answer is d. By default, LAG will aggregate all ports by using PAgP protocol.

LAG stands for Link Aggregation Group, which is a technique used to combine multiple physical ports into a single logical link. When LAG is enabled on a Wireless LAN Controller (WLC) with eight distribution system ports, by default it will aggregate all ports using the PAgP (Port Aggregation Protocol) protocol.

PAgP is a Cisco proprietary protocol that helps create aggregated EtherChannels for link redundancy and increased bandwidth. It ensures that the physical links forming the LAG are connected to the same switch and have compatible settings to form a channel. In this case, all eight ports will be aggregated by default using PAgP.