For no particular reason, I got to wondering about the terms broadcast and non broadcast networks. Someone said to me that what makes a network topology "broadcast" is that it contains a mechanism for sending a single message to al connected stations, where a "non broadcast" topology has no such mechanism. Thus frame relay is non broadcast, and token ring is broadcast. Any comments? Chuck Please help feed hungry people worldwide http://www.hungersite.com/ A small thing each of us can do to help others less fortunate than ourselves ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]