回複：silly question abt LAN

check your friends computer settings:
control panel=>my connections=>(right click) propertities=>TCP/IP=>propertite==> check his settings there.

Usually the settings at home and the settings at office is different. For instance, you are using a routers at home, you need to setup the DHCP in the reuter website. (e.g. 192.168.XXX.XXX). but at office, all the computers goes intot the internet through a server in your building. the IP address and gateway settings is necessary. You must keep the same settings as your freinds---only the "local IP" is different.----the local IP is distributed by the server to distinguish different computers at the same building (intra-net).