My instructor has left and im in open lab atm. My Local Area Connection is configured as follows...IP Address 10.22.215.20....Subnet Mask 255.255.0.0....Default Gateway 10.22.1.1. My book I am using does not go over this and i googled it and can not find a sufficient answer. What Class would i be in and what would my network id be when i play around with the DCPROMO command?

I tried using http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dniph/html/tcpipintro.asp to help me but I am not good with network id's. Any links that explain how to determine Network ID's better would also be awesome :D

Edit: My preferred DNS is 10.22.214.212 if that matters at all.

Hmm... Not sure if I get what you're asking...

If I understand what you're asking correctly, the network ID you're looking at is 10.22.0.0. Thats because your subnet mask of 255.255. means that the first two octets are set aside to specify your network, and the last two are nodes. It gets really fun when you get into VLSM stuff... like 255.224. Some of those can be a pain in the butt.

Class? Sounds like you're in an OS class to me... *rimshot* Ok... You mean, as in Class A, B, C and so on? The 10 network is in the Class A range (Class A networks are 1 - 126).

Thats pretty basic stuff, though... did you have something else in mind?

*Tries to remember all the steps in DCPROMO... bah...* Ya know... my 2k3 instructor tried to hammer those steps into our heads... I've done it more times than I can count and been tested on it... but its been too long since I've put it into practice.

You are in a Class A network ( 10.xx.xx.xx). The network is subnetted (255.255.xx.xx)

A Class A network of 10.xx.xx.xx would have a subnet mask of 255.0.0.0

Since the second octet is 255, your subnet address is actually 10.22.xx.xx

With a subnet mask of 255.255.0.0 you would not be able to see anything outside of 10.22.xx.xx

Your network address is 10.22.0.0

Your host address is... 10.22.215.20

The 10 ip range is a reserved class A. The 255.255.0.0 subnet mask you have puts you in an effective class B carved out of that class A, although nobody uses that notation much any more.

You normally see your info listed as 10.22/16 (16 bit mask on 10.22)

I think your best bet is the answer "C" .... that is what I put when in doubt....

Thank you for enlightening me. Your answers are well appreciated =)