Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!ucsd!ucbvax!VENERA.ISI.EDU!braden From: braden@VENERA.ISI.EDU Newsgroups: comp.protocols.tcp-ip Subject: Re: subnet mask problem Message-ID: <8905241653.AA04577@braden.isi.edu> Date: 24 May 89 16:53:16 GMT Sender: daemon@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 11 However, because the algorithm for using masks is to perform a logincal AND and test for equality, technically 255.255.0.255 could be used as a mask. Or could it? 1) is a mask such as 255.255.0.255 even legal (i.e. conform to specifications) Yes. Please see Section 1.1.4 of RFC-1009, "Requirements for Internet Gateways". Bob Braden