DRAG DROP
Click and drag the RSTP port state on the left to its matching equivalent STP role, on the right. RSTP port
states may be used more than once, and it may not be necessary to use all RSTP port states.
Select and Place:
Answer: 
Explanation:
Rapid Spanning Tree Protocol (RSTP) was developed to reduce the high convergence times required in
Spanning Tree Protocol (STP), and introduces the alternate port and backup port. RSTP is an Institute of
Electrical and Electronics Engineers (IEEE) standard, 802.1w, and is interoperable with 802.1d (STP). There
are fewer transitional states used in RSTP than STP. In RSTP, there are only Forwarding, Learning, and
Discarding. The three states are defined as follows:
Forwarding – the state of all root ports and designated ports. The port is passing traffic.Learning – the state of a port that was formerly discarding but due to a change in the topology (link down) it
has transitioned to learn its new state. The port could return to discarding or move to forwarding depending
on the new topology needs
Discarding – the state of all non-root and non- designated ports. The port is not passing traffic to prevent
potential switching loops.
RSTP can reconfigure the spanning tree in less than a second, compared to the 50 seconds that STP may
take. This is achieved through having fewer transition states, the use of alternate and backup ports, and faster
transitions.
Objective:
LAN Switching Fundamentals
Sub-Objective:
Configure, verify, and troubleshoot STP protocolsCisco > Technology Support > LAN Switching > Spanning Tree Protocol > Technology White Paper >
Understanding Rapid Spanning Tree Protocol (802.1w)
Cisco Support > Technology Support > LAN Switching > Spanning Tree Protocol > Troubleshoot and Alerts >
Troubleshooting TechNotes > Understanding Rapid Spanning Tree Protocol (802.1w)
CCNA Routing and Switching Complete Study Guide: Exam 100-105, Exam 200-105, Exam 200-125, 2nd
Edition, Chapter 2: LAN Switching Technologies – Configure, verify, and troubleshoot STP protocols