You are asked to set up 802.1X port authentication for all access ports on your EX Series switch.
You must ensure that only one user is allowed to authenticate per port and all other attempts are
denied.
Which supplicant mode must be used?
A.
single mode
B.
single-secure mode
C.
default mode
D.
multiple mode
http://www.juniper.net/techpubs/en_US/junos13.2/topics/example/802-1x-pnac-single-supplicant-multiple-supplicant-configuring.html
Single-secure supplicant mode authenticates only one end device to connect to an authenticator port. No other end device can connect to the authenticator port until the first logs out.
Besides, part of the new 80Q JN0-647 dumps for your reference:
https://drive.google.com/open?id=0B-ob6L_QjGLpejBJUUI1X2NuU3M
Best Regards!