Free Download New Updated Cisco CCIE R&S 400-101 Real Exam Questions and Answers 311-320

By | October 20, 2014

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QUESTION 311

Which two of these are used in the selection of a root bridge in a network utilizing Spanning Tree Protocol IEEE 802.1 D? (Choose two.)

 

A.

Designated Root Cost

B.

bridge ID priority

C.

max age

D.

bridge ID MAC address

E.

Designated Root Priority

F.

forward delay

 

Correct Answer: BD

 

 

QUESTION 312

If a port configured with STP loop guard stops receiving BPDUs, the port will be put into which state?

 

A.

learning state

B.

listening state

C.

forwarding state

D.

loop-inconsistent state

 

Correct Answer: D

 

 

QUESTION 313

What is the purpose of the STP PortFast BPDU guard feature?

 

A.

enforce the placement of the root bridge in the network

B.

ensure that a port is transitioned to a forwarding state quickly if a BPDU is received

C.

enforce the borders of an STP domain

D.

ensure that any BPDUs received are forwarded into the STP domain

 

Correct Answer: C

 

 

QUESTION 314

When STP UplinkFast is enabled on a switch utilizing the default bridge priority, what will the new bridge priority be changed to?

 

A.

8192

B.

16384

C.

49152

D.

65535

 

Correct Answer: C

 

 

 

QUESTION 315

Which of these best describes the actions taken when a VTP message is received on a switch configured with the VTP mode “transparent”?

 

A.

VTP updates are ignored and forwarded out all ports.

B.

VTP updates are ignored and forwarded out trunks only.

C.

VTP updates are made to the VLAN database and are forwarded out trunks only.

D.

VTP updates are ignored and are not forwarded.

 

Correct Answer: B

 

 

QUESTION 316

Refer to the exhibit. In this network, R1 has been configured to advertise a summary route, 192.168.0.0/22, to R2. R2 has been configured to advertise a summary route, 192.168.0.0/21, to R1. Both routers have been configured to remove the discard route (the route to null created when a summary route is configured) by setting the administrative distance of the discard route to 255. What will happen if R1 receives a packet destined to 192.168.3.1?

 

clip_image001

 

A.

The packet will loop between R1 and R2.

B.

It is not possible to set the administrative distance on a summary to 255.

C.

The packet will be forwarded to R2, where it will be routed to null0.

D.

The packet will be dropped by R1, since there is no route to 192.168.3.1.

 

Correct Answer: A

 

 

QUESTION 317

Refer to the exhibit. In this network, R1 is configured not to perform autosummarization within EIGRP. What routes will R3 learn from R2 through EIGRP?

 

clip_image002

 

A.

172.30.1.0/24 and 10.1.2.0/24; EIGRP only performs autosummarization at the edqe between two major networks.

B.

172.30.0.0/16 and 10.1.2.0/24; R2 will perform autosummarization, although R1 will not.

C.

Since R2 is configured without autosummarization, it will not propagate the 172.30.1.0/24 route.

D.

172.30.0.0/8 and 10.0.0.0/8

 

Correct Answer: A

 

 

QUESTION 318

The classic Spanning Tree Protocol (802.1 D 1998) uses which sequence of variables to determine the best received BPDU?

 

A.

1) lowest root bridge id, 2) lowest sender bridge id, 3) lowest port id, 4) lowest root path cost

B.

1) lowest root path cost, 2) lowest root bridge id, 3) lowest sender bridge id, 4) lowest sender port id

C.

1) lowest root bridge id, 2) lowest sender bridge id, 3) lowest root path cost 4) lowest sender port id

D.

1) lowest root bridge id, 2) lowest root path cost, 3) lowest sender bridge id, 4) lowest sender port id

 

Correct Answer: D

 

 

QUESTION 319

Which three port states are used by RSTP 802.1w? (Choose three.)

 

A.

Listening

B.

Learning

C.

Forwarding

D.

Blocking

E.

Discarding

F.

Disabled

 

Correct Answer: BCE

 

 

QUESTION 320

Refer to the exhibit. Catalyst R is the root bridge for both VLAN 1 and VLAN 2. What is the easiest way to load-share traffic across both trunks and maintain redundancy in case a link fails, without using any type of EtherChannel link-bundling?

 

clip_image003

 

A.

Increase the root bridge priority (increasing the numerical priority number) for VLAN 2 on Catalyst D so that port D2 becomes the root port on Catalyst D for VLAN 2.

B.

Decrease the port priority on R2 for VLAN 2 on Catalyst R so that port D1 will be blocked for VLAN 2 and port D2 will remain blocked for VLAN 1.

C.

Decrease the path cost on R2 on Catalyst R for VLAN 2 so that port D1 will be blocked for VLAN 2 and port D2 will remain blocked for VLAN 1.

D.

Increase the root bridge priority (decreasing the numerical priority number) for VLAN 2 on Catalyst R so that R2 becomes the root port on Catalyst D for VLAN 2.

 

Correct Answer: B

 

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