[Free] Download New Latest (June 2016) Cisco 400-201 Practice Test 31-40

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QUESTION 31

In MPLS traffic engineering, which one of the following protocols is used for Path Setup?

 

A.

BGP

B.

OSPF

C.

ISIS

D.

RSVP

 

Correct Answer: D

 

 

QUESTION 32

The OSPF External LSA for prefix x.x.x.x exists in the OSPF database, but the prefix is not installed in the routing table. Which are possible explanations? (Choose three)

 

A.

ASBR originating the LSA is not reachable.

B.

Route to the Forwarding Address is an internal OSPF route.

C.

Inbound distribute-list is configured under the ospf process and it is denying x.x.x.x

D.

Route to the ASBR does not follow the same path as the one to the Forwarding Address.

E.

Route to the Forwarding Address is not an internal OSPF route.

 

Correct Answer: ACE

 

 

 

 

QUESTION 33

Which statement about MPLS Traffic Engineering class-based tunnel selection (CBTS) is not true?

 

A.

Local mechanism is at the middle-point router.

B.

EXP selection is between multiple tunnels to the same destination

C.

Bundle members are configured with EXP values to carry.

D.

The tunnel selection is configured on the tunnel master.

E.

The tunnel master bundles the tunnel members

 

Correct Answer: A

Explanation:

1.7. MPLS Traffic Engineering

 

 

QUESTION 34

Which three of these are optical channel data unit (ODU) overhead fields? (Choose three)

 

A.

general communication channel 0 (GCC0)

B.

section monitoring

C.

reserved (RES)

D.

general communication channels 1 and 2 (GCC1 GCC2)

E.

tandem connection monitoring activation deactivation (TCM ACT)

 

Correct Answer: CDE

Explanation:

Optical Data Unit (ODU)

The ODU overhead is broken into several fields: RES, PM, TCMi, TCM ACT, FTFL, EXP, GCC1/GCC2 and APS/PCC. The reserved (RES) bytes are undefined and are set aside for future applications.

 

The path monitoring (PM) field is similar to the SM field described above. It contains the TTI, BIP-8, BEI, BDI and Status (STAT) sub-fields.

 

There are six tandem connection monitoring (TCMi) fields that define the ODU TCM sub- layer, each containing TTI, BIP-8, BEI/BIAE, BDI and STAT sub-fields associated to each TCM level (i=1 to 6). The STAT sub-field is used in the PM and TCMi fields to provide an indication of the presence or absence of maintenance signals.

 

The tandem connection monitoring activation/deactivation (TCM ACT) field is currently undefined in the standards. The fault type and fault location reporting communication channel (FTFL) field is used to create a message spread over a 256-byte multiframe. It provides the ability to send forward and backward path-level fault indications.

 

The experimental (EXP) field is a field that is not subject to standards and is available for network operator applications.

 

General communication channels 1 and 2 (GCC1/GCC2) fields are very similar to the GCC0 field except that each channel is available in the ODU. The automatic protection switching and protection communication channel (APS/PCC) supports up to eight levels of nested APS/PCC signals, which are associated to a dedicated-connection monitoring level depending on the value of the multiframe.

 

 

QUESTION 35

Which OSPF LSA is used to support MPLS Traffic-Engineering?

 

A.

NSSA LSA (Type 7)

B.

Opaque LSA (Type 11)

C.

Opaque LSA (Type 9)

D.

Opaque LSA (Type 10)

E.

External LSA (Type 5)

 

Correct Answer: D

Explanation:

Type 10 – an area-local “opaque” LSA as defined by RFC2370. Opaque LSAs contain information which should be flooded by other routers even if the router is not able to understand the extended information itself.

Typically type 10 LSAs are used for traffic engineering extensions to OSPF, flooding extra information about links beyond just their metric, such as link bandwidth and color.

 

 

QUESTION 36

Refer to the exhibit. If the SP network is configuring RTBH filtering to protect hosts on the 152.68.19.0/24 network, which router should be configured as the black hole activating router?

 

clip_image001

 

A.

F

B.

C

C.

D

D.

L

E.

A

F.

K

 

Correct Answer: A

Explanation:

1.13. Security in core

1.13.15. Remote triggered black hole (RTBH)

 

 

QUESTION 37

BGP best route selection process is based on what?

 

A.

path attributes

B.

lowest cost

C.

highest bandwidth

D.

lowest delay

E.

lowest hop-count

 

Correct Answer: A

 

 

QUESTION 38

Where are MPLS point-to-multipoint traffic engineering packets replicated?

 

A.

head-end router

B.

branch-point router

C.

midpoint router

D.

leaf-point router

E.

tail-end router

 

Correct Answer: B

Explanation:

Reference:

http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_te_p2mp.pdf

1.7. MPLS Traffic Engineering

 

 

QUESTION 39

What is the role of Forwarding Equivalence Class (FEC) in MPLS?

 

A.

FEC determines how to establish an LSP path.

B.

FEC determines how IP packets are forwarded in MPLS LSP.

C.

FEC determines how MPLS labels are stacked in LSP.

D.

FEC determines how a group of IP packets are mapped to an LSP.

 

Correct Answer: D

 

 

QUESTION 40

There are two cabling schemes to choose from when implementing a Cisco CRS-1 multi shelf system: single module cabling and multi module cabling. What is the maximum capacity of the LCCs that are supported in multi module cabling?

 

A.

9 LCCs

B.

7 LCCs

C.

10 LCCs

D.

6 LCCs

E.

8 LCCs

 

Correct Answer: A

Explanation:

1.4. SP high end product

A single card or multiple cards can be grouped as a fabric plane. Single-module cabling requires eight S2 cards in the fabric card chassis. In this mode, each S2 is dedicated to a plane number and cabled to the appropriate line card chassis plane. If your network requires more than three LCC in the multi shelf system, this is achieved using the multi module configuration. Multi module configuration provides capacity to add up to nine LCCs.

 

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