[AccessD] Access over network

When you open an Access DB, over a network, does it pull the whole DB
over, or does it just open it, until the data is needed?

This has been coming up quite a bit lately. Not so much for my
programs, but for 'other' stuff. For instance we currently have an
imaging program, which has a Access DB behind it. They are trying to run
this between offices, which are about 25 miles apart.

Thanks

John W Clark