[Free] 2017(Apr) Ensurepass Examcollection Cisco 400-201 Latest Dumps 71-80

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CCIE Service Provider Written Exam v4.1

QUESTION 71

Refer to the exhibit. An engineer is troubleshooting CSC-PE and CSC-CE configurations and finds that there is a missing communication between Layer 3 VPN customer sites that are connected to customer carrier provider. What is the cause of this issue?

 

clip_image002

 

A.

The static route configured on CSC-PE1 is missing the vrf keyword on next-hop information.

B.

The CSC-PE1 does require knowledge of the Layer 3 VPN customer prefixes in order to allocate and exchange Layer 3 VPN labels with CSC-CE1.

C.

A CSC design requires selective label allocation.

D.

The CSC-PE1 device is not allocating labels for the CSC backbone carrier route reflector.

E.

The CSC-PE1 and CSC-CE1 routers are not exchanging labeled IPv4 prefixes, which results in LSP blackholing.

 

Correct Answer: E

 

 

QUESTION 72

Which three statements about OSPF partial SPF are true? (Choose three)

 

A.

If it is triggered by Type 4, all Type 4 LSAs that announce a certain ASBR and all Type 5 and 7 LSAs are processed

B.

If it is triggered by Types 5 and 7, all Type 5 and 7 LSAs that contribute to a certain destination are processed.

C.

If it is triggered by Type 2, all Type 2 LSAs that contribute to a certain destination are processed.

D.

It is triggered by the change of Type 3, 4, 5, and 7 LSAs.

E.

It is triggered by the change of Type 2, 3, 5, and 7 LSAs

 

Correct Answer: ABD

Explanation:

Executed on a change in a type-3/4/5/7 LSA (as per sections 16.5 and 16.6 of RFC2328) If there is a change in a type-1 or type-2 LSA, it affects the topology of the area and so a full SPF must be run.

 

 

QUESTION 73

Refer to the exhibit. The NOC engineer noticed that the R2 router system clock is not updated and synchronized to the NTP server that is configured on the R10 router. What is the issue?

 

clip_image004

 

A.

The access list NTP_Clients is missing.

B.

The access group is misconfigured.

C.

The maximum number of peers and client associations is exceeded.

D.

The authentication key is mismatched.

E.

The PE2 router should be configured as an NTP peer instead of as a client.

 

Correct Answer: D

 

 

QUESTION 74

Which two routing protocols support MPLS traffic engineering link information distribution? (Choose two)

 

A.

OSPF

B.

BGP

C.

RIP version 2

D.

IS-IS

E.

EIGRP

 

Correct Answer: AD

 

 

QUESTION 75

One ISP has hundreds of routers that run IS-IS, you want to redesign the network to improve performance and convergence, which are correct ways? (Choose two)

 

A.

Bidirectional forwarding failure detection

B.

tuning of SPF PRC and LSP…….exp backoff timers

C.

IS-IS fast flooding of LSPs

D.

IP Event Dampending

E.

tuning of IS-IS hello parameters

 

Correct Answer: BC

 

 

QUESTION 76

Which are the two purposes of the MPLS label value 1? (Choose two.)

 

A.

it is used for MPLS OAM packets.

B.

it indicates an implicit null label.

C.

it is used for VPNv6 packets.

D.

it is used to carry the QoS value in the label stack.

E.

it indicates an explicit null label.

F.

it indicates a router alert label.

 

Correct Answer: CF

Explanation:

http://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switching-mpls/mpls/4649-mpls-faq-4649.html#qa3

http://www.iana.org/assignments/mpls-label-values/mpls-label-values.xhtml

IPv4 Explicit NULL Label —-> 0

Router Alert Label —-> 1

IPv6 Explicit NULL Label —–> 2

Implicit NULL Label —–> 3

OAM Alert Labe —–> 14

 

 

QUESTION 77

Refer to the exhibit. ISP-X customers must be able to reach both ISP-Y and ISP-Z, but ISP-X must not allow transit traffic between ISP-Y and ISP-Z at any time Which two options satisfy this requirement? (Choose two.)

 

clip_image006

 

A.

Use the MED to prefer the proper routes

B.

Use communities to identify and filter routes.

C.

Use local preference to prefer the routes

D.

Use a route map to filter routes on the AS number.

E.

Use the atomic aggregate attribute

 

Correct Answer: BD

 

 

QUESTION 78

Which two statements about the various types of DevOps tools are true? (Choose two.)

 

A.

Puppet requires the installation of a master (server) and agents (clients) architecture for configuring systems.

B.

Salt cannot communicate with clients through general SSH, it use minions client agents only.

C.

Puppet and chef are written in Python. Python skills are a must to operate these two.

D.

Ansible does not require agent node installation and uses SSH for performing all tasks.

E.

Chef and Puppet are much more attuned to the needs of system administrators.

 

Correct Answer: DE

 

 

 

QUESTION 79

Which two frame types are correct when configuring T3 interfaces? (Choose two.)

 

A.

M23

B.

G.832

C.

Extended Super Frame

D.

C-bit parity

E.

G.751

F.

Super Frame

 

Correct Answer: AD

Explanation:

http://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs_r4-2/interfaces/configuration/guide/hc42crsbook/hc42t3e3.html

 

 

QUESTION 80

An engineer is working to provide high availability to a Service Provider core network. Which BGP command enables a backup path to be installed in the RIB and CEF tables?

 

A.

maximum-paths ibgp

B.

bgp additional-paths install

C.

maximum-paths eibgp

D.

bgp additional-paths select

E.

bgp advertise-best-external

 

Correct Answer: B

Explanation:

http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/irg-xe-3s-book/bgp_best_external.html#GUID- 66F31B75-B1E6-4B38-9B4D-6A89839930CE

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