Which authentication modes would result in a user-agent receiving a HTTP 401-Unauthorized
status codes from the proxy? (Choose all that apply)
(a) origin-ip-redirect
(b) proxy-ip
(c) origin-cookie
(d) form-cookie-redirect
A.
a & b only
B.
a & c only
C.
b & c only
D.
c & d only
E.
None of the above