Priscilla brings up an important point - it doesn't really make a difference which method you use - as long as you get the right answer, and aren't dependent on any external devices! BJ I do use decimal. ;-) Just like someone else said, I do make a list such as: 128, 192, 224, 240, 248, 252, 254, 255. I don't get the tricks I've seen people do where they subtract from 256 (or something like that. Since I don't get them, I can't remember them!) Priscilla Bradley J. Wilson CCNP CCDP MCSE NNCSS CNX MCT CTT EDS/Boston Scientific Account (508) 650-8739 [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=15544&t=15544 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]