Latest Cisco CCIE 400-101 Real Exam Download 81-90

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QUESTION 81

The session status for an IPsec tunnel with IPv6-in-IPv4 is down with the error message IKE message from 10.10.1.1 failed its sanity check or is malformed.

Which statement describes a possible cause of this error?

 

A.

There is a verification failure on the IPsec packet.

B.

The SA has expired or has been cleared.

C.

The pre-shared keys on the peers are mismatched.

D.

There is a failure due to a transform set mismatch.

E.

An incorrect packet was sent by an IPsec peer.

 

Answer: C

 

 

QUESTION 82

Which three statements describe the characteristics of a VPLS architecture? (Choose three.)

 

A.

It forwards Ethernet frames.

B.

It maps MAC address destinations to IP next hops.

C.

It supports MAC address aging.

D.

It replicates broadcast and multicast frames to multiple ports.

E.

It conveys MAC address reachability information in a separate control protocol.

F.

It can suppress the flooding of traffic.

 

Answer: ACD

 

 

QUESTION 83

A GRE tunnel is down with the error message %TUN-5-RECURDOWN:

 

Tunnel0 temporarily disabled due to recursive routing error.

 

Which two options describe possible causes of the error? (Choose two.)

 

A.

Incorrect destination IP addresses are configured on the tunnel.

B.

There is link flapping on the tunnel.

C.

There is instability in the network due to route flapping.

D.

The tunnel mode and tunnel IP address are misconfigured.

E.

The tunnel destination is being routed out of the tunnel interface.

 

Answer: CE

 

 

QUESTION 84

Refer to the exhibit. Which two statements about the VPN solution are true? (Choose two.)

 

clip_image001

 

A.

Customer A and customer B will exchange routes with each other.

B.

R3 will advertise routes received from R1 to R2.

C.

Customer C will communicate with customer A and B.

D.

Communication between sites in VPN1 and VPN2 will be blocked.

E.

R1 and R2 will receive VPN routes advertised by R3.

 

Answer: CE

 

 

QUESTION 85

Which three statements about IS-IS are true? (Choose three.)

 

A.

IS-IS can be used only in the service provider network.

B.

IS-IS can be used to route both IP and CLNP.

C.

IS-IS has three different levels of authentication: interface level, process level, and domain level.

D.

IS-IS is an IETF standard.

E.

IS-IS has the capability to provide address summarization between areas.

 

Answer: BCE

 

 

QUESTION 86

Which mechanism does Cisco recommend for CE router interfaces that face the service provider for an EVPL circuit with multiple EVCs and multiple traffic classes?

 

A.

HCBWFQ

B.

LLQ

C.

tail drop

D.

WRED

 

Answer: A

 

 

QUESTION 87

Which Carrier Ethernet service supports the multiplexing of multiple point-to-point EVCs across as a single UNI?

 

A.

EPL

B.

EVPL

C.

EMS

D.

ERMS

 

Answer: B

 

 

QUESTION 88

Refer to the exhibit. Which two statements about the EEM applet configuration are true? (Choose two.)

 

clip_image002

 

A.

The EEM applet runs before the CLI command is executed.

B.

The EEM applet runs after the CLI command is executed.

C.

The EEM applet requires a case-insensitive response.

D.

The running configuration is displayed only if the letter Y is entered at the CLI.

 

Answer: AC

 

 

QUESTION 89

Which technology can be used to prevent flooding of IPv6 multicast traffic on a switch?

 

A.

IGMP snooping

B.

IGMP filtering

C.

MLD snooping

D.

MLD filtering

 

Answer: C

 

 

QUESTION 90

Which variable in an EEM applet is set when you use the sync yes option?

 

A.

$_cli_result

B.

$_result

C.

$_string_result

D.

$_exit_status

 

Answer: D

 

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