[Free] 2017(Apr) Ensurepass Examcollection Cisco 400-201 Latest Dumps 261-270

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CCIE Service Provider Written Exam v4.1

QUESTION 261

Refer to the exhibit. R1 and R2 are multicast routers running PIM over Serial1/0. The PIM adjacency on R1 is not forming with the given configuration. What command can be entered on R1 to resolve the issue?

 

clip_image002

 

A.

no access-list 100 deny 103 any any

B.

no access-list 100 deny udp any anyeq 103

C.

no access-list 100 deny ip any host 224.0.0.1

D.

no access-list 100 deny ip any host 224.0.0.2

 

Correct Answer:
A

Explanation:

All PIM protocols share a common control message format. PIM control messages are sent as raw IP datagrams (protocol number 103), either multicast to the link-local ALL PIM ROUTERS multicast group, or unicast to a specific destination. Reference: http://www.metaswitch.com/resources/what-is-protocol-independent-multicast- pim

 

QUESTION 262

Refer to the exhibit. The SP network is configuring Remote Filtering to protect hosts on network 152.68.19.0/24. Which routers should be configured to the sinkhole router?

 

clip_image004

 

A.

L and K

B.

A, B, F, G, and H

C.

C and D

D.

A, B, G, and H

E.

A, D, F, G, and L

 

Correct Answer: D

 

 

QUESTION 263

Which open source cloud computing platform uses the Neutron project as Network?

 

A.

OpenStack

B.

opendaylight

C.

Ansible

D.

Cisco UCS Director

 

Correct Answer: A

 

 

QUESTION 264

In which three ways do PE routers manage multiple customers in MPLS VRF environments? (Choose three.)

 

A.

Route targets are configured that allow the PE to uniquely identify the customer routes in MP-BGP

B.

PE routers use route distinguishers to tag routes for importing and exporting into customer VRFs.

C.

PE routers use PE-CE routing protocols to manage routing with client VRF devices.

D.

PE routers use route targets to tag routes for importing and exporting into customer VRFs.

E.

Route distinguishes are configured that allow the PE to uniquely identify the customer routes in MP-BGP.

F.

PE routers use PE-PE routing protocols to manage routing with client VRF devices.

 

Correct Answer: CDE

 

 

QUESTION 265

Refer to the exhibit. ABC and XY2 MPLS VPN customers require Internet access. An ISP engineer deployed the solution on PE1 device. Which statement about CEs connectivity to Internet is true?

 

clip_image006

 

A.

Only CE-XYZ will have connectivity

B.

Neither CE will have connectivity, as IAR does not have route back to the subnet used on NAT configuration.

C.

Both CEs will have connectivity.

D.

Only CE-ABC will have connectivity.

E.

Neither CE will have connectivity, as both CEs are using the same subnet used on NAT configuration.

 

Correct Answer: C

 

 

QUESTION 266

In the Dual Stack Lite solution, what is the function of the B4 component?

 

A.

It reverses network address translated of the iPv4 packets coming from the internet and it sends the resultant IPv4 packets to AFTR.

B.

it decapsulates the tunneled IPv4 packets, translates the network address and routes to the IPv4 network.

C.

it encapsulates the customer IPv4 packets using an IPV6 tunnel and sends to the AFTR.

D.

it acts as an endpoint for the IPv6 in IPv4 encapsulation and forwarding.

 

Correct Answer: D

 

 

QUESTION 267

Which two statements about the bgp deterministic-med and bgp always-compare-med commands are true? (Choose two)

 

A.

The bgp deterministic-med command is used to influence the BGP route selection process to cause the MED attribute to have higher precedence over the AS path length

B.

The bgp always-compare command is used to influence the BGP route selection process to cause the MED attribute to have higher precedence over the AS path system.

C.

Enabling the bgp deterministic-med command ensures the comparison of the MED variable when choosing routes advertised by different peers in the same autonomous system.

D.

Enabling the bgp always-compare-med command ensures the comparison of the MED variable for paths from neighbors in different autonomous systems.

E.

The bgp deterministic-med and bgp always-compare-med commands are enabled by defult.

 

Correct Answer: CD

Explanation:

Enabling the bgp deterministic-med command ensures the comparison of the MED variable whenchoosing routes advertised by different peers in the same autonomous system. Enabling the bgpalways-compare-med command ensures the comparison of the MED for paths from neighbors indifferent autonomous systems. Note. The bgp deterministic-med and bgp always-compare-med commands are not enabled bydefault. Also, the two commands are separate; enabling one does not automatically enable theother.

 

 

QUESTION 268

A Service provider NOC engineer received numerous support tickets from th
eir VPN customers. These customers are reporting packet loss between two PE routers. The NOC engineer created a VRF TEMP to run tests between these two PE routers, and no errors were reported. ECMP links are use between P and PE routers. Which test can quickly identify the core link that is causing the problems?

 

A.

A vrf traceroute between customer’s CE router and service provider’s remote PE router

B.

An mpls traceroute with multipath option between the PE’s loopbacks

C.

An extend ping with sweep option between the PE’s loopbacks

D.

An mpls ping with sweep option between the PE’s loopbacks

E.

A vrf ping between customer’s CE router and service provider’s remote PE router

 

Correct Answer: B

Explanation:

http://www.cisco.com/c/en/us/td/docs/ios/12_2sb/feature/guide/sb_mmtr.html#wp1052687

 

 

QUESTION 269

Which statement about Remotely Triggered Black Hole (RTBH) is true?

 

A.

Route tagging is one of the techniques used by RTBH

B.

It is used for BGP authentication

C.

It cannot work with static routes

D.

It uses extended ACLs for blocking attacks by creating a black hole

E.

Before configuring RTBH. LDP must be enabled on the interface

 

Correct Answer: A

 

 

QUESTION 270

Refer to the exhibit. A network engineer is troubleshooting PTP on Cisco ASR 9000 router. What can be concluded about the interface based on output provided?

 

clip_image008

 

A.

The interface receives timestamps from a master clock, but therouter’s clock is not yet synchronized to the master.

B.

The interface is aware of a better clock than the one it would advertise if it was in Master state.

C.

The interface is not yet ready to participate on PTP.

D.

The interface is about to go into Master state.

 

Correct Answer: A

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