Spanning tree protocol

[stillnumber1]

I am having a hard time understanding what I need to know for the test. When it comes to the spanning tree protocol. I understand that it prevents a bridiging loop. And create one active path. Also that it places each port into a forwarding or blocking state. Is there anything else that I might need to know about the Spanning tree protocol.

 

[jdel]

just be sure to know how it operates and how it will react to a route going down in any configuration.

 

[Microbyte]

yes, for CCNA level one has to answer these following in a flash.

what is BPDU?
how the root bridge is elected and the designated port?
which OSI layer does STP fit under?
is STP enabled by default in catalyst x?

 

[CCIEcandidate]

This link explains STP very well. I found it helpful during my CCNA studies.

http://www.cisco.com/warp/public/473/spanning_tree1.swf

HTH,
Nick