This unit lets you use a mini USB to use the Comand Line Programing interface with a windows computer; much more convienient than a dumb terminal through the command port. Nice free programing interface software on the Cisco web site to allow configuration in a GUI through the network connection;...
Very well built, solid machine; Expandable to do almost everything you could want it to.
This is just a starter; too many limits without buying licenses to get all the functions you'll want. You want to use the fire wall, buy a licence, want to VPN, another license to buy, want multiple WANs then you need additional hardware and a licence