[Free] 2017(Apr) Ensurepass Examcollection Cisco 400-201 Latest Dumps 81-90

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CCIE Service Provider Written Exam v4.1

QUESTION 81

In order to prevent malicious traffic flows, how does BGPsec protect prefix advertisements?

 

A.

It validates only the originating AS.

B.

It validates routes with encryption.

C.

It validates the AS path.

D.

It validates the next-hop AS.

 

Correct Answer: C

Explanation:

http://www.cisco.com/c/en/us/about/press/internet-protocol-journal/back-issues/table-contents-52/142-bgp.html

< font style="font-size: 10pt" color="#000000">Securing Route Propagation: BGPsec

 

 

QUESTION 82

SSO was configured on a Cisco ASR 1006 Router by using two RPs. When the main RP failed, a service disruption occurred. What are two reasons that the SSO did not work? (Choose two.)

 

A.

The standby RP has a different DRAM configuration than the primary RP.

B.

HSRP and NSF are not configured.

C.

The ESP that is installed in the Cisco ASR 1006 Router does not support SSO.

D.

The standby RP was not ready to switch over when the primary RP failed.

E.

The standby RP has a different IOS version than the primary RP.

 

Correct Answer: BE

Explanation:

http://www.cisco.com/c/en/us/td/docs/routers/asr1000/configuration/guide/chassis/asrswcfg/High_Availability.html

 

 

QUESTION 83

In PIM-SM operations, the first router connected to the multicast source sends the Register message to which device?

 

A.

Designated Router (DR)

B.

Multicast source

C.

Multicast receiver

D.

RP mapping agent

E.

RP

 

Correct Answer: E

 

 

QUESTION 84

A service provider with MPLS traffic-eng tunnels is supporting multicast traffic that uses RPF to ensure the source of the sender. The unicast routing table points the source through TE, which does not support multicast and RPF fails. Which action fixes the issue?

 

A.

Use auto-route announce under MPLS TE.

B.

Use multicast-intact under IGP.

C.

Use IGMP snooping.

D.

UseCGMP.

 

Correct Answer: B

 

 

QUESTION 85

Which description is true about how remote IP fast Reroute addresses failure in the ring topologies?

 

A.

Routers establish an MPLS TE tunnel with all PQ nodes in the ring.

B.

Routers establish an MPLS TE tunnel with both ring edge routers.

C.

Routers establish a GRE tunnel with the furthest PQ node in the ring.

D.

Routers establish a targeted LDP session with the furthest router that is in a PQ space. It requires an equal cost path.

E.

Routers establish a targeted LDP session with the closest router that is in a PQ space.

F.

Router establish a GRE tunnel with the closest PQ node in the ring.

 

Correct Answer: E

 

 

 

 

QUESTION 86

Refer to the exhibit. Which router is the DIS?

 

clip_image002

 

A.

router-22

B.

router-44

C.

router-33 and router-44

D.

router-11

E.

router-33

 

Correct Answer: E

QUESTION 87

What is one difference between H-VPLS and VPLS?

 

A.

H-VPLS reduces signaling overhead and packet replication requirements for the provider edge

B.

VPLS connect usingg Ethernet encapsulation only an d H-VPLS using also other LAYER-2 encapsulation such as PPP

C.

VPLS improve scalability concern identify on H-VPLS implementation

D.

VPLS is a point-to-point Layer-2 service and H-VPLS is a multipoint Layer-2 services

 

Correct Answer: A

 

 

QUESTION 88

When the Cisco IOS OSPF command ip ospf dead-interval minimal hello-multiplier 5 is configured, which two statements are true? (Choose two.)

 

A.

OSPF hello interval is 5 seconds

B.

OSPF hello interval is 1 second

C.

OSPF dead interval is 1 second

D.

OSPF dead interval is 5 seconds

E.

OSPF dead interval is 20 seconds

F.

OSPF hello interval is 0.2 second

 

Correct Answer: CF

 

 

QUESTION 89

Which security mechanism could be used to secure CoAP?

 

A.

DTLS

B.

MACsec

C.

IPsec

D.

etc

 

Correct Answer: A

 

 

QUESTION 90

Which BGP feature improves the convergence and response time to adjacency changes with BGP neighbors?

 

A.

reducing BGP scanner timing to the minimum that is supported

B.

BGP Multihop

C.

Next-Hop Address Tracking

D.

Fast Peering Session Deactivation

E.

TTL Security Check

 

Correct Answer: C

Explanation:

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

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