These are questions I remember being asked. But they also asked what experience with servers I have and stuff..

     * At which layer things are in the OSI model.

     * How to reset AD user passwords.

     * What different kinds of servers are for.

     * Access port 25 in VLAN1 but not VLAN2 using port forwarding in the firewall

      * What ways of securing a DMZ are available in emergencies.