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H12-821_V1.0 · Question #1137
H12-821_V1.0 Question #1137: Real Exam Question with Answer & Explanation
The correct answer is A. If a port does not receive configuration BPDUs from the upstream device within four hello intervals, the switch considers that the negotiation with the neighbor fails.. See the full explanation below for the reasoning.
Question
Compared with loop-free network but has a slow network topology convergence speed, affecting communication quality. RSTP has made some improvements based on STP.
Which of the following improvements is not included?
A. If a port does not receive configuration BPDUs from the upstream device within four hello intervals, the switch considers that the negotiation with the neighbor fails.
B. The non-root switch running RSTP sends configuration BPDUs at the interval specified by the Hello timer, which is performed independently by each device.
C. RSTP reduces five port states to three port states based on user traffic forwarding and MAC address learning.
D. RSTP reduces three port states and adds two port roles.
Options
- AIf a port does not receive configuration BPDUs from the upstream device within four hello intervals, the switch considers that the negotiation with the neighbor fails.
- BThe non-root switch running RSTP sends configuration BPDUs at the interval specified by the Hello timer, which is performed independently by each device.
- CRSTP reduces five port states to three port states based on user traffic forwarding and MAC address learning.
- DRSTP reduces three port states and adds two port roles.
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