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Which of the following are true about Rapid Spanning Tree Protocol _RSTP? (Choose two)
RSTP is a Cisco proprietary form of 802.1D STP.
RSTP has the same port states of 802.1D.
RSTP is compatible with the 802.1D protocol.
RSTP roles are discarding, learning and forwarding.
RSTP is reactive because it uses 802.1D delay timers.
The original STP (802.1D) was expanded and enhanced by IEEE and converted into Rapid Spanning Tree Protocol (802.1w). Cisco improved the original 802.1D IEEE specification and made a new proprietary standard, PVST+, which later expanded into Rapid PVST+. RSTP speeds up the recalculation of the STP in the layer 2 network topology changes. RSTP remains compatible to the original 802.1D but uses only three states, Discarding, Learning and Forwarding. For more information refer to [http://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24062-146.html]
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