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CCIE Routing and Switching Written Exam v5.1

QUESTION 811

Refer to the exhibit. Assume that Cisco Discovery Protocol is supported and enabled only on switches A and C. Which information is returned when you issue the command show cdp neighbors on switch C?

 

clip_image001

 

A.

a limited amount of information about switch B

B.

neighbor details for switch A

C.

neighbor details for switch B

D.

neighbor details for switch C

 

Correct Answer: B

 

 

QUESTION 812

Which two statements about ERSPAN are true? (Choose two.)

 

A.

It supports jumbo frames of up to 9202 bytes.

B.

It adds a 50-byte header to copied Layer 2 Ethernet frames.

C.

It supports packet fragmentation and reassembles the packets.

D.

It adds a 4-byte header to copied Layer 2 Ethernet frames.

E.

Source sessions on an individual switch can use different origin IP addresses.

 

Correct Answer: AB

 

 

QUESTION 813

Which two statements about PBR route maps are true? (Choose two.)

 

A.

They can use extended ACLs to identify traffic.

B.

They can route unicast traffic without interface-level classification.

C.

They can be applied to both ingress and egress traffic.

D.

They can classify traffic based on prefix-lists.

E.

They can set the metric and IP precedence bits.

 

Correct Answer: AB

 

 

QUESTION 814

Which three events can cause a control plane to become overwhelmed? (Choose three.)

 

A.

a worm attack

B.

processing a stream of jumbo packets

C.

a microburst

D.

a configuration error

E.

a reconvergence failure

F.

a device-generated FTP session

 

Correct Answer: ADE

 

 

QUESTION 815

Which three statements are true about unicast RPF? (Choose three.)

 

A.

Unicast RPF requires CEF to be enabled.

B.

Unicast RPF strict mode works better with multihomed networks.

C.

Unicast RPF strict mode supports symmetric paths.

D.

Unicast RPF strict mode supports asymmetric paths.

E.

CEF is optional with Unicast RPF, but when CEF is enabled it provides better performance.

F.

Unicast RPF loose mode is typically used with ISP networks.

 

Correct Answer: ACF

 

 

QUESTION 816

What are three benefits of deploying NAT with ALG? (Choose three.)

 

A.

the use of dynamic ephemeral ports through a firewall

B.

the synchronization of translations between multiple streams of data

C.

the use of deep packet inspection

D.

the use of static ephemeral ports through a firewall

E.

the conversion of session layer addresses from the application payload to outside global addresses

F.

NAT traversal to support asymmetric data sessions

 

Correct Answer: ABC

 

 

QUESTION 817

Which two statements about a network running MPLS VPN with IS-IS IGP are true? (Choose two.)

 

A.

IS-IS traffic engineering uses wide metric TLV type 135 with an up/down bit to define a leaked route.

B.

IS-IS traffic engineering uses wide metric TLV type 128 with an internal/external bit and an up/down bit to define a leaked route.

C.

IS-IS traffic engineering uses wide metric TLV type 130 with an internal/external bit and an up/down bit to define a leaked route.

D.

If the IS-IS up/down bit is set to 1, the leaked route originated in the L1 area.

E.

The MPLS VPN IS-IS core is inherently protected against IP-based attacks.

 

Correct Answer: AE

 

 

QUESTION 818

When VRF-Lite is configured without BGP support, which statement about the configuration of the route target and route distinguisher is true?

 

A.

The configuration of the route target and route distinguisher is required.

B.

The configuration of the route target and route distinguisher is not required.

C.

The configuration of the route target is required and the configuration of the route distinguisher is not required.

D.

The configuration of the route target is not required and the configuration of the route distinguisher is required.

 

Correct Answer: D

 

 

QUESTION 819

Refer to the exh
ibit. How many LSDBs will router A have?

 

clip_image002

 

A.

0

B.

1

C.

2

D.

3

 

Correct Answer: D

QUESTION 820

Which two options are requirements for Control-Plane Policing? (Choose two.)

 

A.

Cisco Express Forwarding must be enabled globally.

B.

Cisco Discovery Protocol must be disabled in the control plane.

C.

A crypto policy must be installed.

D.

A loopback address must be configured for device access.

E.

A class map must be configured to identify traffic.

 

Correct Answer: AE

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