Which two of these statements regarding RSTP are correct? (Choose two.)
A.
RSTP cannot operate with PVST+.
B.
RSTP defines new port roles.
C.
RSTP defines no new port states.
D.
RSTP is a proprietary implementation of IEEE 802.1D STP.
E.
RSTP is compatible with the original IEEE 802.1D STP.
Per-VLAN Spanning Tree (PVST) maintains a spanning tree instance for each VLAN configured in the network.
RSTP is an Enhancement of the Original STP. Port Roles Determine Participation in The Spanning-Tree. Port States is How a Port Processes a Frame.
RSTP works by adding an alternative port and a backup port compared to STP.
RSTP is able to interoperate with legacy STP protocols.
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Add new ports but compatible with original
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RSTP (Rapid Spanning Tree Protocol)
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Spanning Tree Protocol (STP) was originally standardized as IEEE 802.1D, in 802.1d-1998, but much of the functionality (spanning tree, rapid spanning tree, multiple spanning tree) previously specified in 802.1D, 802.1s, 802.1w has been incorporated into IEEE 802.1Q-2014
As the name suggests, it creates a spanning tree within a network of connected layer-2 bridges (typically Ethernet switches), and disables those links that are not part of the spanning tree, leaving a single active path between any two network nodes. STP is based on an algorithm that was invented by Radia Perlman while she was working for Digital Equipment Corporation.
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