I'm not sure if i understand your questions, http://www.cisco.com/warp/public/473/5.html has information on how STP works and each of the phases (blocking, listening, learning, forwarding)
How do you mean breaks a collision domain? A switch has collison domains equal to the amount of physical ports. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38144&t=38137 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]