unmounting a network..

in the finder sidebar, when i click on the computer icon it brings up two volumes, my HD, and a "Network" when i try to open it it there is nothing there.. when i "get info" on this "Network", it tells me is that its a Neighborhood network, no preview, no permission info. i checked system profiler under network volumes and it lists,

net:
Type: autofs
Mount Point: /net
Mounted From: map -hosts
Automounted: Yes

home:
Type: autofs
Mount Point: /home
Mounted From: map auto_home
Automounted: Yes

i have NO access to ether of them. is this normal? if not what steps to take to unmount them? HELP!!