6.6.10 Practice Questions

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You have just connected four switches as shown in the Exhibit. Assuming the default switch configuration, which switch will become the root bridge? A B C D

B

Auto mode places the port into a passive negotiating state.

Port Aggregation Protocol (PAgP)

A switch running STP is classified as a backup bridge. What state is it in? Disabled Blocking Forwarding Listening Learning

Blocking

You have just connected four switches as shown in the Exhibit. Assuming the default switch configuration, how can you force switch C to become the root bridge? Remove link cables 1 and 6 from the configuration. Configure a priority number of 61440 for switch C. Remove link cable 6 from the configuration. Remove link cable 1 from the configuration. Configure a priority number of 4096 for switch C.

Configure a priority number of 4096 for switch C.

You have three switches configured as shown in the Exhibit. How can you guarantee that switch C becomes the root bridge? Configure switch C with a lower priority value. Configure Fa0/1 and Fa0/2 on switch C with a higher port priority. Configure Fa0/1 and Fa0/2 on switch C with a lower port priority. Configure Fa0/1 and Fa0/2 on switch C with a lower cost value. Configure switch C with a higher priority value. Configure Fa0/1 and Fa0/2 on switch C with a higher cost value.

Configure switch C with a lower priority value.

A switch running STP is in the listening state. A message destined for a different network segment arrives at the switch. Which of the following best describes what the switch will do? It does not record address or segment information. However, the message is forwarded. It places the source address and segment in its database, but does not forward the message. It places the source address and segment in its database and forwards the message. It does not record address or segment information. It does not forward the message.

It does not record address or segment information. It does not forward the message.

A switch is running STP is in the learning state. A message destined for a different network segment arrives at the switch. Which of the following best describes what the switch will do? It does not record address or segment information. It does not forward the message. It places the source address and segment in its database and forwards the message. It does not record address or segment information. However, the message is forwarded. It uses the source MAC address and network segment information to build its bridge database, but does not forward the message.

It uses the source MAC address and network segment information to build its bridge database, but does not forward the message.

Active mode places the port in a negotiating state.

Link Aggregation Control Protocol (LACP)

Based on the 802.3ad standard.

Link Aggregation Control Protocol (LACP)

Passive mode places the port into a passive negotiating state.

Link Aggregation Control Protocol (LACP)

Switches running STP are in the process of exchanging BPDUs and redefining their roles. Which port state are the switches currently in? Learning Listening Forwarding Blocking Disabled

Listening

Desirable mode places the port in a negotiating state.

Port Aggregation Protocol (PAgP)

Which statements accurately describe the port states of both bridges and switches? (Select two.) In the learning state, the MAC address table cannot be populated because the port is blocked. Ports in a blocked state still receive BPDUs. In the learning state, the MAC address table can be populated, but frames are not forwarded. In the learning state, all ports are in a forwarding state. Ports in a blocked state cannot receive BPDUs.

Ports in a blocked state still receive BPDUs. In the learning state, the MAC address table can be populated, but frames are not forwarded.

You need to configure spanning tree on a Cisco switch. You'd like to use a protocol that conforms to the 802.1w standards. Which protocol should you use? Rapid PVST+ PortFast BPDU guard EtherChannel

Rapid PVST+

Which of the following solutions would you implement to eliminate switching loops? Inter-VLAN routing Auto-duplex Spanning tree CSMA/CD

Spanning Tree

Which of the following features dynamically places switch ports in blocking or forwarding states? Mirroring Trunking PoE Spanning tree

Spanning tree

You manage a network that uses multiple switches. You want to provide multiple paths between switches so that if one link goes down, an alternate path is available. Which feature should your switch support? Mirroring PoE Trunking OSPF Spanning tree

Spanning tree

You manage a single subnet with three switches. The switches are connected to provide redundant paths between the switches. Which feature prevents switching loops and ensures there is only a single active path between any two switches? PoE Trunking 802.1x Spanning tree Bonding

Spanning tree

Which problem does the spanning tree protocol prevent? Buffer overflows by defining source-quench messages that a receiving device sends to the transmitting device. Switching loops from developing when redundant paths are implemented between switches. Routing tables from becoming outdated by decreasing the convergence time on a network. Packet blocking on backup bridge ports to allow switches to forward frames to all BPDUs.

Switching loops from developing when redundant paths are implemented between switches.


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