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CCIE Routing and Switching Written Exam v5.1

QUESTION 771

Which two statements about path selection are true? (Choose two.)

 

A.

If there are multiple equal matches between OSPF processes, the path with the lowest OSPF PID is chosen.

B.

If the backdoor command is configured on a BGP network, the route is advertised with an AD of 20.

C.

If an OSPF E2 route has an AS of 90, that path is preferred over an OSPF IA route with an AD of 110.

D.

If there are multiple equal matches between the same protocols on an EIGRP network, the preferred path will be EIGRP with the highest AS.

E.

If IS-IS has multiple routes with the same prefix-length, it will prefer Level 1 routes over Level 2 routes.

 

Correct Answer: AE

 

 

QUESTION 772

Refer to the exhibit. IPv6 SLAAC clients that are connected to the router are unable to acquire IPv6 addresses. What is the reason for this issue?

 

clip_image001

 

A.

Router advertisements are not sent by the router.

B.

Duplicate address detection is disabled but is required on multiaccess networks.

C.

The interface is configured to support DHCPv6 clients only.

D.

The configured interface MTU is too low for IPv6 to be operational.

 

Correct Answer: A

 

 

 

QUESTION 773

Which two statements about MAC Authentication Bypass are true? (Choose two.)

 

A.

Traffic from an endpoint is authorized to pass after MAB authenticates the MAC address of the endpoint.

B.

During the learning stage, the switch examines multiple packets from the endpoint to determine the MAC address of the endpoint.

C.

After the switch learns the MAC address of the endpoint, it uses TACACS+ to authenticate it.

D.

After learning a source MAC address, it sends the host a RADIUS Account-Request message to validate the address.

E.

The MAC address of a device serves as its user name and password to authenticate with a RADIUS server.

 

Correct Answer: AE

 

 

QUESTION 774

An IP SLA fails to generate statistics. How can you fix the problem?

 

A.

Add the verify-data command to the router configuration.

B.

Reload the router configuration.

C.

Remove the ip sla schedule statement from the router configuration and re-enter it.

D.

Add the debug ip sla error command to the router configuration.

E.

Add the debug ip sla trace command to the router configuration.

 

Correct Answer: A

 

 

QUESTION 775

Which statement about UDLD is true?

 

A.

The udld reset command resets ports that have been error-disabled by both UDLD and Fast UDLD.

B.

Fast UDLD is configured in aggressive mode.

C.


Only bidirectional link failures can be detected in normal mode.

D.

Each switch in a UDLD topology can send and receive packets to and from its neighbors.

 

Correct Answer: A

 

 

QUESTION 776

What are two benefits of Per-Tunnel QoS for DMVPN? (Choose two.)

 

A.

The administrator can configure criteria that, when matched, can automatically set up QoS for each spoke as it comes online.

B.

Traffic from each spoke to the hub can be regulated individually.

C.

When traffic exceeds a configurable threshold, the spokes can automatically set up QoS with the hub.

D.

The hub can send large packets to a spoke during allotted timeframes.

E.

The hub can be regulated to prevent overloading small spokes.

 

Correct Answer: AE

 

QUESTION 777

Refer to the exhibit. If a connection failure occurs between R1 and R2, which two actions can you take to allow CR-1 to reach the subnet 192.168.192.0/24 on R2? (Choose two.)

 

clip_image002

 

A.

Create a static route on R1 for subnet 192.168.192.0/24 towards R3 and redistribute it into OSPF.

B.

Turn up a BGP session between CR-1 and R1.

C.

Create a static route on R1 for subnet 192.168.192.0/24 towards R3 and redistribute it into BGP.

D.

Turn up an EIGRP session between R1 and R3 with AS 65535.

E.

Create an OSPF virtual link between CR-1 and R2 to bypass R1.

 

Correct Answer: AB

 

 

QUESTION 778

Which two statements about Cisco Performance Routing are true? (Choose two.)

 

A.

It analyzes application performance to make routing decisions.

B.

When determining the best path, it prefers the shortest path.

C.

It can help the administrator determine the need for bandwidth upgrades.

D.

It operates entirely in the data plane.

E.

It can use EIGRP feasible successors to determine an alternate path.

F.

It analyzes system hardware performance to make routing decisions.

 

Correct Answer: AE

 

 

QUESTION 779

What is the function of an implicit-null label?

 

A.

It notifies the upstream LSR to remove the top label in the label stack and forward the packet.

B.

It notifies the upstream LSR to add a VPN label to the label stack.

C.

It is used to statically assign a label to an IGP route.

D.

It is used to identify the router ID.

 

Correct Answer: A

 

 

QUESTION 780

Refer to the exhibit. Which statement about this GET VPN configuration is true?

 

clip_image003

 

A.

Router 1 acts as the primary key server because it has a higher priority.

B.

An RSA key has been imported into the configuration.

C.

The GDOI group configuration generated a key.

D.

DPD is disabled.

 

Correct Answer: A

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