UNIX for Dummies Questions & Answers

Which network protocol is used by UNIX systems to make remote file systems appear as if they are local?

The most common software package for remote files under unix is NFS. Network protocols are layered. There is one layer called the "network layer" and unix mostly uses IP for the network layer.

See this link which is a fairly good description of the whole process.

I must disagree with that page on one point, though. NFS mostly uses UDP for the transport layer, but TCP support is starting to show up.

That looks and sounds like a homework question...