AOS-Switches authenticate guests to ClearPass with captive portal. An administrator notices that some guests are unable t

o reach the captive portal page. What will resolve this issue?

A. Permit DNS on the ClearPass Portal

B. Permit DHCP on the ClearPass Portal.

C. Permit HTTP or HTTPS on the ClearPass Portal.

D. Permit Allow All MAC-Auth on the CleatPass Portal.