350-401 Question 169
Select 4An enterprise network is deploying new access points (APs) which need to discover and join a Wireless LAN Controller (WLC). Which of the following methods can an AP use to discover a WLC during the discovery process?
- A
Broadcast on the local subnet
- B
DNS query for a controller name
- C
DHCP Option 43
- D
Manual configuration via CLI
- E
Using a neighbor AP's configuration
Show answer and explanation
Correct answers: A, B, C, D
Explanation
Access points use several methods to discover a Wireless LAN Controller (WLC) during the join process. These include broadcasting within the local subnet, querying a DNS server for a controller hostname, obtaining the WLC IP address via DHCP Option 43, or manually configuring the WLC IP address through CLI. Neighboring APs do not share WLC configuration, so this option is not valid.
- A. Correct.
Correct: An AP can use broadcast discovery on the local subnet to identify available WLCs. This is a common method when controllers are on the same subnet as the AP.
- B. Correct.
Correct: Access points can use a DNS query to resolve the hostname of a controller. This is often configured with a specific DNS entry pointing to the WLC.
- C. Correct.
Correct: DHCP Option 43 is commonly used to provide the IP address of a WLC to an AP during the discovery process.
- D. Correct.
Correct: Manual configuration of the WLC IP address can also be done using the AP's CLI, particularly for specific deployment scenarios.
- E. Incorrect.
Incorrect: APs cannot use configuration from neighboring APs to discover a WLC. Neighboring APs do not share this information.