Yes - both operating systems have implementations of TCP/IP, so they can be networked successfully.
Yes one can use the vista in a server 2003 network As long as it is Vista Business or Vista Ultimate.
Yes.
the windows anytime upgrade tool
Apple's Airport Express comes with software that can be used with a PC. The requirements are a PC with Windows XP (SP2) or Windows Vista, CD drive, Ethernet or wireless networking capability. To connect to the network a PC needs 802.11a/b/g/n capability.
It has been compatible with Windows Vista since March 2007.
running an instance of Windows Vista from inside a Windows 7 OS
Only games that worked in Windows Vista will work for Windows 7. Unless, they are games such as The Sims or SimCity.
The company PC Advisor gives a complete and detailed review on Windows Vista on its website. They also provide some user reviews, required specifications and prices of Windows Vista.
depends on the software many games must have the older software. Windows 95 games don't all run on windows XP let alone windows vista or windows 7
Vista is just a version of Windows; the version after Windows XP and before Windows 7. If a machine is Vista-ready or Vista-compatible, it just means that the hardware and available drivers are compatible with Windows Vista. You might be able to run that PC on Windows 7 or 8, but it depends, and you would have to check with the manufacturer to find out what all it is compatible with.
It depends on which version. 4 and 5 versions are compatible with vista.
One can find information on Windows Vista Enterprise from many places. For instance, the official Microsoft website, BayconGroup, and PC Support all offer information on Windows Vista Enterprise.