What two mechanisms are used to redirect users to a web portal to authenticate to ISE for guest services? (Choose two.)

What two mechanisms are used to redirect users to a web portal to authenticate to ISE for guest services? (Choose two.)
A . TACACS+
B . central web auth
C . single sign-on
D . multiple factor auth
E . local web auth

Answer: BE

Explanation:

Reference: https://www.cisco.com/c/en/us/td/docs/security/ise/2-2/admin_guide/b_ise_admin_guide_22/b_ise_admin_guide_22_chapter_01110.html