--a single-site IIS web server for testing web work
--Remote desktop connection - useful when you have several systems and don't want to get up out of your chair to use one that's across the room. Also known as terminal server
--more detailed permissions management
RDC could be useful to you if you have several systems and need to configure network rendering. IIS wouldn't be useful to Vegas but might be useful on a machine that you want to test rendered movies on. Permissions? more useful if you have more than one user in the office and want central storage on one XP machine.