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Which protocol can help find redundant links in a switched network and place one in a blocking state?
PPP
DTP
CDP
VTP
STP
Spanning Tree Protocol "STP" is the protocol used by default on some Switches to prevent switching loops on redundant networks by placing one port in blocking state. For more information refer to: http://www.cisco.com/c/en/us/tech/lan-switching/spanning-tree-protocol/index.html
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