CCNP R&S Practice Exam 3 - MCQs

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How is a bridging loop best described?

The round-trip path a frame takes from source to destination.

A loop formed between switches for redundancy.

A loop formed between switches where frames circulate endlessly.

A loop formed by the Spanning Tree Protocol.

What command can change the path cost of interface Gigabit Ethernet 3/1 to a value of 8?

spanning-tree path-cost 8

spanning-tree cost 8

spanning-tree port-cost 8

spanning-tree gig 3/1 cost 8

If a VTP server is configured for VTP version 2, what else must happen for successful VTP communication in a domain?

A VTP version 2 password must be set.

All other switches in the domain must be version 2 capable.

All other switches must be configured for VTP version 2.

The VTP configuration revision number must be reset.

Which one of the following is needed for VTP communication?

A Management VLAN

An Access VLAN

A Trunk link –

An IP address

To maintain a loop-free STP topology, which one of the following should a switch uplink be protected against?

BPDUs relayed from the root bridge

A sudden loss of BPDUs

Too many BPDUs

The wrong version of BPDUs

What network diameter value is the basis for the default STP timer calculations?

Where should the STP PortFast feature be used?

An access-layer switch port connected to a PC

An access-layer switch port connected to a hub

A distribution-layer switch port connected to an access layer switch

A core-layer switch port

Select all the parameters that decide whether to accept new VTP information:

VTP priority

VTP domain name

Configuration revision number

VTP server name

Which of the following commands is most likely to make a switch become the root bridge for VLAN 5, assuming that all switches have the default STP parameters?

spanning-tree root

spanning-tree root vlan 5

spanning-tree vlan 5 priority 100

spanning-tree vlan 5 root

Where should the root bridge be placed on a network?

Closest to the most users

On the fastest switch

Closest to the center of the network

On the least-used switch

Which of the following might present a VTP problem?

Two or more VTP servers in a domain

Two servers with the same configuration revision number

A server in two domains

A new server with a higher configuration revision number

Which one of the following commands can be used to verify the current root bridge in VLAN 10?

show root vlan 10

show root-bridge vlan 10

show spanning-tree vlan 10 root

show running-config

What is the default path cost of a Gigabit Ethernet switch port?

1000

Where should the STP UplinkFast feature be enabled?

A distribution-layer switch.

An access-layer switch.

A core-layer switch.

All these answers are correct.

How many VTP management domains can a Catalyst switch participate in?

Unlimited

4096

Which one of the following is a valid VTP advertisement?

Triggered update

Subset

VLAN database

Domain

Which of these parameters should you change to make a switch become a root bridge?

Port priority

Bridge priority

Path cost

Switch MAC address

Which of the following is not a Catalyst switch VTP mode?

Transparent

Designated

Client

Server

Which VLAN number is never eligible for VTP pruning?

1000

1001

What happens if the root bridge switch and another switch are configured with different STP Hello timer values?

Nothing—each sends hellos at different times.

A bridging loop could form because the two switches are out of sync.

The switch with the lower Hello timer becomes the root bridge.

The other switch changes its Hello timer to match the root bridge

Why is it important to protect the placement of the root bridge?

So the root bridge can have complete knowledge of the STP topology.

So all hosts have the correct gateway.

To keep two root bridges from becoming active.

To keep the STP topology stable.

Which of the following is a result of a poorly placed root bridge in a network?

Root bridge election flapping occurs.

STP topology can take unexpected paths.

STP topology can’t be resolved.

Bridging loops form.

Which one of the following VTP modes does not allow any manual VLAN configuration changes?

Server

Client

Designated

Transparent

Which IOS command configures a Catalyst switch for VTP client mode?

vtp client

vtp mode client

set vtp mode client-

vtp client mode

What is the default 802.1D STP bridge priority on a Catalyst switch?

32,768

65,535

What is the purpose of VTP pruning?

Limit the size of the virtual tree

Limit the extent of broadcast traffic

Limit the number of VLANs in a domain

Stop unnecessary VTP advertisements-

If used, the STP BackboneFast feature should be enabled on which of these?

All backbone- or core-layer switches

All backbone- and distribution-layer switches

All access-layer switches-

All switches in the network

A switch in VTP transparent mode can do which one of the following?

Create a new VLAN

Only listen to VTP advertisements

Send its own VTP advertisements

Cannot make VLAN configuration changes

How many instances of STP are supported in the Cisco implementation of MST?

256

4096

Where does a collision domain exist in a switched network?

On a single VLAN

Across all VLANs

On a single switch port

Across all switch ports