Quiz-9

What additional information is contained in the 12-bit extended system ID of a BPDU?

• • MAC address

• • VLAN ID

• • IP address

• • port ID

Which STP port role is adopted by a switch port if there is no other port with a lower cost to the root bridge?

• • designated port

• • root port

• • alternate

• • disabled port

Which three components are combined to form a bridge ID?

• • extended system ID

• • cost

• • IP address

• • bridge priority

• • MAC address

In which two port states does a switch learn MAC addresses and process BPDUs in a PVST network? (Choose two.)

• • disabled

• • forwarding

• • listening

• • blocking

• • learning

If no bridge priority is configured in PVST, which criteria is considered when electing the root bridge?

• • lowest MAC address

• • lowest IP address

• • highest IP address

• • highest MAC address

When the show spanning-tree vlan 33 command is issued on a switch, three ports are shown in the forwarding state. In which two port roles could these interfaces function while in the forwarding state? (Choose two.)

• • alternate

• • designated

• • disabled

• • blocked

• • root

What is a characteristic of spanning tree?

• • It is enabled by default on Cisco switches.

• • It is used to discover information about an adjacent Cisco device.

• • It has a TTL mechanism that works at Layer 2.

• • It prevents propagation of Layer 2 broadcast frames.

What is the purpose of the Spanning Tree Protocol (STP)?

• • creates smaller collision domains

• • prevents routing loops on a router

• • prevents Layer 2 loops

• • allows Cisco devices to exchange routing table updates

Which statement is true regarding the use of PAgP to create EtherChannels?

• • It requires full duplex.

• • It requires more physical links than LACP does.

• • It mandates that an even number of ports (2, 4, 6, etc.) be used for aggregation.

• • It is Cisco proprietary.

What are two requirements to be able to configure an EtherChannel between two switches? (Choose two.)

• • All the interfaces need to work at the same speed.

• • All interfaces need to be assigned to different VLANs.

• • Different allowed ranges of VLANs must exist on each end.

• • All the interfaces need to be working in the same duplex mode.