Hi I am currently running a 255.555.255.0 subnet (Class C) network and wish to move to a Class B 255.255.0.0 network. I currently have a domain trust running, with both domains, will this be affected by the change? I am unsure of what steps to take in order to accomplish this, any advice, docs or links to websites that will aid me in this would be greatly appreciated Thanks People

The network mask has nothing to do with the network class. For your information, there is no more available class-B anyway. You should contact your network administrator if you have problem with your network or need to add computers Danny

hey, I've always asked myself, what is the difference between runnign a subnet mask: 255.0.0.0 and 255.255.255.0 thanks,

LOL, you can use the Private class B subnet, but you can't run on the Internet, you need a public IP address to do that. If you have a company and for Internel use only, you can use the Privite class A (10.0.0.0/8) subnet or the class B etc.....

You can run a class B private network irregardless of what your internet address is...use NAT. ;-) I currently use a Class C private network, but my internet IP address is anything but. ;-) That's what these SOHO routers are all about! Your subnet mask reveals which part of your IP address is the network address, and which part is your computer's host address. If your IP address is 192.168.0.2, and your subnet mask is 255.255.255.0, your network address is 192.168.0.0. If your subnet mask were to be 255.0.0.0, then 192.0.0.0 is your network address. That btw is technically invalid. This was just for educational purposes. If you want more info on how it works, you need a crash course in binary. ;-) MCSE, MCSA Messaging, baby!