User Manual Part 1

Page 71
Setup STP
(Available in Access Point, Transparent Client, and Repeater modes)
Spanning Tree Protocol (STP) prevents broadcast storms when there are
redundant paths in the network. STP creates a tree that spans all
devices in an extended network, forcing redundant paths into a
standby state, but establishing the redundant links as backup in case
the active link should fail. If STP costs change, or if one network
segment in the STP becomes unreachable, the spanning tree algorithm
reconfigures the spanning tree topology and re-establishes the
connection by activating the standby path. The path with the smallest
cost will be used and extra redundant paths will be disabled.