What is the purpose of the guest VLAN on a Cisco Catalyst switch?

A.
It provides configurable guest access to devices that have a supplicant but lack local
credentials.

B.
It provides configurable guest access to non-supplicant devices that lack local
credentials.

C.
It provides configurable guest access to devices that have a supplicant when the
authenticator is down or unreachable.

D.
It provides configurable guest access to non-supplicant devices that have local
credentials.

E.
It provides configurable guest access to devices that have a supplicant when the
authentication server is down or unreachable.

Explanation: