Which DHCP option supplies CAPWAP APs with the wireless controller address?
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Correct answer: 43.
Why this is the answer
DHCP Option 43 is used to provide vendor-specific information to DHCP clients. For Cisco CAPWAP Access Points (APs), this option is specifically configured to deliver the IP address(es) of the Wireless LAN Controller (WLC). This allows the AP to discover and connect to the WLC for centralized management and configuration. Option 66 is used for TFTP server name, often for IP phone boot files. Option 69 is not a standard DHCP option. Option 150 is used for TFTP server address, primarily for Cisco IP Phones to download their configuration files. None of these options are designed for WLC discovery by CAPWAP APs.
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