I am excited

any kind of last min advice ? Job title is "System admin (router management)"
I know that They are using Zyxel Zywall USG 50 as a router. There are 10 workstations. They all use Windows including Server. They have other office which has ftp and the web server there. So probably there is a kind of VPN between these 2 offices. Router is a nice product which has a firewall ability as well as all router capabilities including load balancing and so on. But i don't know what may they ask

My only big concern is if they will ask about active directory or not because job title includes " system admin "
Aaa, I am really excited