You are working on a deployment that uses two Cisco APs as wireless bridges. One of the bridges is configured as a root bridge and the second bridge is configured as a nonroot bridge. Client A associates to the root bridge and client B associates to the nonroot bridge. Which two statements about this scenario is true? (Choose two.) 

Answer options:

A. Only one device can connect to the Ethernet port of a noonroot bridge.
B. For two bridges to communicate with each other, one of the bridges must be in root mode and the other bridge must be in nonroot mode.
C. In point-to-multipoint bridging, WGB is not recommended with the root bridge.
D. Two bridges that are in root mode can talk to each other.
E. The default setting of a bridge is nonroot bridge.

B

For two bridges to communicate with each other, one of the bridges should be in rootmode and the other bridge must be in non-rootmode. The default setting of a bridge isroot. Therefore, two bridges that are in rootmode cannot talk to each other. Reference: http://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/16041-bridge-faq.html