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.)
Click on the arrows to vote for the correct answer
A. B. C. D. E.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.
http://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/16041-bridge-faq.htmlSure, here's a detailed explanation for each statement:
A. Only one device can connect to the Ethernet port of a nonroot bridge. This statement is not entirely accurate. In fact, nonroot bridges can connect to multiple devices via their Ethernet port using a switch or hub. However, it is true that nonroot bridges can only connect to one root bridge in point-to-point bridging mode, which is the most common deployment scenario for wireless bridges.
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. This statement is true. In point-to-point bridging mode, one bridge must be configured as the root bridge and the other as a nonroot bridge. The root bridge initiates communication with the nonroot bridge and sends beacons to advertise its presence. The nonroot bridge listens for these beacons and uses them to establish a connection with the root bridge.
C. In point-to-multipoint bridging, WGB is not recommended with the root bridge. This statement is partially true. In point-to-multipoint bridging mode, the wireless group bridge (WGB) feature is not recommended with the root bridge, as it can cause performance issues and instability. However, it is recommended to use the WGB feature with nonroot bridges to connect multiple wired devices to a wireless network.
D. Two bridges that are in root mode can talk to each other. This statement is not entirely accurate. In fact, two bridges in root mode cannot communicate with each other, as they both expect to be the root bridge and will not initiate communication with each other. However, two nonroot bridges can communicate with each other in point-to-point bridging mode.
E. The default setting of a bridge is nonroot bridge. This statement is true. By default, a Cisco wireless bridge is configured as a nonroot bridge, as it is typically the more common deployment scenario for wireless bridges.
In summary, the correct answers to the question are B and E.