The apple instructions would do that because it is very uncommon to have internet provided like that....I just had a look at the student information guide to ethernet and got the following quote:
"However, for Ethernet you do not require the ADSL/cable modem or router, and you will use a different lead if you connect at home via USB."
Presuming it will work then?
I'm just concerned because the Apple instructions show it going through a separate modem.