If you don't to map a network drive with net use you can access a UNC Path directly from the Command Prompt using pushd.
For example:
pushd \\server\share
This will create a temporary mapped drive automatically for you and make it your current working directory.
When you're finished on the network share enter the popd command. This will return you to the directory you were in before and delete the temporary network drive.
The popd and pushd commands can be used with local directories. They build up a stack of visited directories which can be handy if you work on the command line a lot. So when you if change directory with pushd you can get back to where you were with popd. A stack of directories is built up with each pushd and you go one directory back up the stack with popd.