Which two statements about this scenario are true?

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 are true? (Choose two.)

A. For two briges to communicate with each other, one of the bridges must be in root mode and the other bridge must be in nonroot mode.

B. Two bridges that are in root mode can talk to each other.

C. In point-to-multipoint bridging. WGB is not recommended with the root bridge.

D. Only one device can connect to the Ethernet port of a nonroot bridge.

E. The default setting of a bridge is nonroot bridge.

Answer: AC

Explanation:

From:

Cisco Aironet Wireless Bridges FAQ -Cisco http://www.cisco.com/c/en/us/support/docs/wireless­mobility/wireless-lan-wlan/16041-bridge-faq.html

Q. Why do two bridges not communicate automatically, right out of the box?

A. For two bridges to communicate with each other, one of the bridges should be in root mode and the other bridge must be in non-root mode. The default setting of a bridge is root. Therefore, two bridges that are in root mode cannot talk to each other.

Troubleshoot Common Problems with Wireless Bridged Networks -Cisco http://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/22950-br-ts­22950.html#reset

Cisco IOS Configuration Guide for Autonomous Aironet Access Points Cisco IOS Release 15.3(3)JAB -Configuring Radio Settings [Cisco Aironet 1040 Series] -Cisco http://www.cisco.com/c/en/us/td/docs/wireless/access_point/15-3-3/configuration/guide/cg15-3-3/cg15-3-3-chap6-radio.html

Workgroup bridge (WGB) short-range support.

Note In point-to-multipoint bridging, WGB is not recommended with the root bridge. WGB should be associated to the root AP in point-to-multipoint bridging setup.

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