Votes 0 2010.10.16 13:01:46 Joon *.164.93.52 http://www.joonlee0228.net/10522 The  Spanning tree protocol  ( STP ) is a  link layer   network protocol  that ensures a loop-free  topology  for any  bridged   LAN . Thus, the basic function of STP is to prevent  bridge loops  and ensuing  broadcast radiation . In the  OSI