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| Question ID 18541 | Refer to the exhibit.
If you change the Spanning Tree Protocol from pvst to rapid-pvst, what is the effect on the
interface Fa0/1 port state?
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| Option A | It transitions to the listening state, and then the forwarding state.
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| Option B | It transitions to the learning state and then the forwarding state.
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| Option C | It transitions to the blocking state, then the learning state, and then the forwarding state.
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| Option D | It transitions to the blocking state and then the forwarding state.
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| Correct Answer | C |
Explanation Explanation: First, the port will transition to the blocking state, immediately upon the change, then it will transition to the new RSTP states of learning and forwarding. Port States There are only three port states left in RSTP that correspond to the three possible operational states. The 802.1D disabled, blocking, and listening states are merged into a unique 802.1w discarding state. STP (802.1D) Port State RSTP (802.1w) Port State Is Port Included in Active Topology? Is Port Learning MAC Addresses? Disabled Discarding No No Blocking Discarding No No Listening Discarding Yes No Learning Learning Yes Yes Forwarding Forwarding Yes Yes
| Question ID 18542 | Which statement is true about trunking?
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| Option A | Cisco switches that run PVST+ do not transmit BPDUs on nonnative VLANs when using a dot1q trunk.
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| Option B | When removing VLAN 1 from a trunk, management traffic such as CDP is no longer passed in that VLAN.
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| Option C | DTP only supports autonegotiation on 802.1q and does not support autonegotiation for ISL.
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| Option D | DTP is a point-to-point protocol.
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| Correct Answer | D |
Explanation Explanation: Ethernet trunk interfaces support different trunking modes. You can set an interface as trunking or nontrunking or to negotiate trunking with the neighboring interface. To autonegotiate trunking, the interfaces must be in the same VTP domain. Trunk negotiation is managed by the Dynamic Trunking Protocol (DTP), which is a Point-to- Point Protocol. However, some internetworking devices might forward DTP frames improperly, which could cause misconfigurations. Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12- 2_55_se/configuration/guide/scg3750/swvlan.html