[Free] 2017(Apr) Ensurepass Examcollection Cisco 400-201 Latest Dumps 181-190

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CCIE Service Provider Written Exam v4.1

QUESTION 181

Refer to the exhibit. Why does R1 not receive a label for 10.0.0.3/32 prefix?

 

clip_image002

 

A.

R1 does not have an established LDP neighborship with the router announcing the 10.0.0.3/32 prefix.

B.

The 10.0.0.3/32 prefix is being null-routed in the downstream neighbor

C.

LDP peer is not configured to advertise a label for the 10.0.0.3/32 prefix

D.

BGP is not configured to exchange labels with the BGP peer advertising 10.0.0 3/32 prefix

 

Correct Answer: C

 

 

QUESTION 182

For MPLS inter-AS Option B, how many labels are associated with packet forwarding between the VPNv4 ASBR neighbors?

 

A.

0

B.

1

C.

2

D.

3

 

Correct Answer: D

Explanation:

http://www.cisco.com/c/en/us/td/docs/ios- xml/ios/iproute_bgp/configuration/xe-3s/irg-xe-3s-book/bgp_nsr_support_for_mpls_vpnv4_and_vpnv6_inter-as_option_b.pdfQUESTION 183

What is the default BGP scanner time?

 

A.

10 minutes

B.

5 minutes

C.

120 seconds

D.

60 seconds

E.

30 minutes

 

Correct Answer: D

Explanation:

The scanning interval of BGP routing information. Valid values are from 15 to 60 seconds.

The default is 60 seconds.

 

 

QUESTION 184

When IPv6 is enabled on an interface, which three multicast addresses does the configured interface automatically join? (Choose three.)

 

A.

FF01::2

B.

FEC0::1

C.

FF02:0:0:0:0:1:FF00::/104

D.

FF02::1

E.

FF01::1

F.

FF02::2

G.

FF02::D

H.

FF02::5

 

Correct Answer: CDF

Explanation:

http://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/4_1/configuration/g uides/cli_4_1/clibook/ipv6.pdf

https://www.iana.org/assignments/ipv6-multicast-addresses/ipv6-multicast-addresses.xml

 

 

QUESTION 185

How much bandwidth is available when one single RSP440 engine installed on an ASR9000?

 

A.

440G bps

B.

Pending

C.

Pending

D.

Pending

 

Correct Answer: A

 

 

QUESTION 186

In MPLS-enabled network, which two improvements does EVPN provide compared to traditional VPLS?

 

A.

Use of LDP to allocate EVPN-related labels

B.

Per flow load balancing

C.

Optimized learning and flooding process

D.

Leveraging of enhanced VFIs to provide greater scalability

E.

No need for exchange of MAC reachability between PEs

F.

Use of BGP as a control-plane protocol

 

Correct Answer: BC

 

 

QUESTION 187

Refer to the exhibit. A regional operations center recently set up a MPLS Inter-AS Option B solution for two service providers There is no intercommunication between CE1 and CE2 sites yet While troubleshooting this issue on the ASBR1 router, the operations engineer sees the following log:

 

BGP(4): 10.24.32.253 rcvd 100:101:40.72.97.0/24, label 136 — DENIED due to: extended community not supported;

 

What does this log mean?

 

clip_image003

 

A.

The route-target value does not match the one in the local VRF

B.

The community that was applied on ASBR 10.24.32.253 does not match the local policies

C.

The bgp default route-target filter command is missing on both inter-AS ASBRs

D.

The BGP command retain route-target all is missing

 

Correct Answer: D

Explanation:

“retain route-target all” is the same command as “bgp default route-target filter” in IOS. The command is negated in XR. This command is enabled by default on RRs but as ASBR on Inter-AS/Option-B is not RR, we need to enable this.

 

 

 

 

QUESTION 188

A security risk has been discovered on the Service Provider MPLS core network during a network audit. Traceroute between the customer sites displays IP addresses of the Service Provider MPLS core. What should be done to hide the IP addresses of the Service Provider MPLS core from the customer traceroute utility?

 

A.

Configure an access list to block traceroute traffic.

B.

Apply the no mpls ip propagate-ttl forward command.

C.

Enable MPLS LDP session protection.

D.

Configure an LDP label allocation filter.

E.

Apply the no mpls ip propagate-ttl local command.

 

Correct Answer: B

 

 

QUESTION 189

Which QoS method is available when GRE is used to provide MPLS VPN services over an IP-only core?

 

A.

matching MPLS EXP on the physical interface

B.

matching EXP on the tunnel interface

C.

matching DSCP on the physical interface

D.

matching DSCP on the tunnel interface

 

Correct Answer: C

 

 

QUESTION 190

A service provider is using Cisco ME 3400 Series Ethernet Access Switches on the access edge of a Metro Ethernet POP. A customer has a requirement to connect a switch to the network and requires the ability to trunk. VLANs on the uplink port into the provider network. Which port type should the engineer configure on the switch to meet this requirement while maintaining secure access edge implementation?

 

A.

UNI

B.

ENI

C.

NNI

D.

Access

 

Correct Answer: A

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