Chapter 11

1. A and B. Listening and learning are transitory port states, used only when moving from the blocking to the forwarding state. Discarding is not an 802.1D STP port state.

2. C and D. Listening and learning are transitory port states, used only when moving from the blocking to the forwarding state. Discarding is not an 802.1D STP port state. Forwarding and blocking are stable states.

3. C. The smallest numeric bridge ID wins the election.

4. B. Nonroot switches forward Hellos received from the root; the root sends these Hellos based on the root’s configured Hello timer.

5. D. The PortFast feature enables STP to move a port from blocking to forwarding, without going through the interim listening and learning states. STP allows this ...

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