H12-821_V1.0 · Question #690
A wireless controller interface has both the DHCP server function and the DHCP relay function enabled. So which of the following descriptions of the processing method of the wireless access…
The correct answer is A. Prioritize using the local DHCP server to assign IP addresses C. Only when the local server cannot assign an IP address, the remote server will be used to assign an IP address. When both DHCP server and DHCP relay are configured on the same wireless controller interface, the device follows a local-first, remote-fallback policy: the local DHCP server is always tried first (A), and the relay to a remote server is only triggered when the local server…
Question
Options
- APrioritize using the local DHCP server to assign IP addresses
- BThe local wireless DHCP server and the remote server can assign IP addresses
- COnly when the local server cannot assign an IP address, the remote server will be used to assign an IP address.
- DPrioritize using the remote DHCP server to assign IP addresses
How the community answered
(33 responses)- A73% (24)
- B9% (3)
- D18% (6)
Explanation
When both DHCP server and DHCP relay are configured on the same wireless controller interface, the device follows a local-first, remote-fallback policy: the local DHCP server is always tried first (A), and the relay to a remote server is only triggered when the local server cannot fulfill the request - for example, when its address pool is exhausted (C).
Why B is wrong: B implies both servers can assign addresses concurrently or interchangeably, which misrepresents the behavior - it is strictly sequential (local first, remote second), not parallel.
Why D is wrong: D inverts the priority. The remote DHCP server via relay is never the first choice when a local server is present and functional.
Memory tip: Think of it like a vending machine at work - you always check the one in your office (local) before walking to the one down the hall (remote relay). The remote is only the backup when your local machine runs out of stock.
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