Not for the Faint hearted - Server contention ratios.

I'll be suprised if anyone can answer this question.  but here
goes

Do servers providing a public service contend access to
applications
via their network card.  ie If a client has 2Mb uncontended
internet
access attempts to download a file via ftp, http etc from a
server in
a remote location will the client have 2mb from his host to the
server
and be able to download stuff from the server at a rate of 2Mbps
or
will the server restrict how much bandwidth a single user may
consume.

lets assume their is no contention anywhere in the network.

My question is focusing on the server technology and how it
manages
client access.  Many web servers have 10Mb outbound access.  So
my
question is if 5 2Mb clients were to download from the server
would
the server permit 5 clients to hog the network card or does each
client get limited.