I've seen this pop up in exam reports too. It's B since Cisco APs expect the info as a hex string inside Option 43, or they won't join the controller. ASCII looks common but doesn't work for actual discovery. If someone has a different experience with newer AP models, would be interested to know!
Q: 6
Which character formatting is required for DHCP Option 43 to function with current AP models?
Options
Discussion
B not A. ASCII looks tempting but for Cisco APs, Option 43 really needs hex, otherwise the controller info won’t parse right. Seen similar question on practice tests.
Probably B. DHCP Option 43 has to be in Hex format so the APs can actually read and parse the controller IPs correctly. ASCII or Base64 won't work since the AP expects that specific hex TLV structure. I remember this from setting up WLC discovery on some older gear too. Pretty sure about B, but let me know if anyone has seen it done differently.
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Question 6 of 35