When using RADIUS as an external authentication method for 802.1X authentication for the Junos Pulse Access Control Service, what must you do to ensure that the RADIUS authentication works properly?

A.
Configure IP helper to forward the authentication requests from the clients to the external RADIUS server

B.
Configure the supplicant as anexternal authentication server

C.
Configure RADIUS proxy on the realm

D.
Specify the correct RADIUS port 389 on the Junos Pulse Access Control Service