2014年9月1日 星期一

CCIE SP 350-029 Question 61-90

CCIE SP Written Exam (Version 3.0)


QUESTION 61
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 62
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


UESTION 63
In the diagram, R1 is the head-end of a TE tunnel that terminates on R5. The red line indicates the protected link, and the gold line indicates the backup tunnel.
Which router is the Point of Local Repair?



A. R2
B. R5
C. R3
D. R1
E. R4







Correct Answer: A


QUESTION 64
Which methods would enable traffic to be forwarded along an MPLS TE tunnel (Choose 4.)
A. MP-BGP routing
B. Static routing
C. Policy routing
D. Autoroute
E. Forwarding adjacency









Correct Answer: BCDE




QUESTION 65
In the context of MPLS Traffic engineering, TE path calculation is conducted by:
A. TE middle point
B. TE tail end
C. Independent server
D. All TE nodes along the path
E. TE head end







Correct Answer: E



QUESTION 66
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 67
Which statements are correct for forwarding traffic into MPLS TE tunnels? (Choose 3)
A. Autoroute causes the tunnel to be treated as a directly connected link to the head-end.
B. Autoroute causes the TE head-end to establish IGP adjacency with the tail-end over the tunnel.
C. Forwarding adjacency makes the TE head-end node advertise the Tunnel LSP into the IGP.
D. Forwarding adjacency supports unequal cost load balancing over multiple TE tunnels.








Correct Answer: ACD



QUESTION 68
Which three statements about MPLS traffic engineering (MPLS TE) are true? (Choose three)
A. MPLS TE supports admission control
B. MPLS TE tunnel traffic is a link attribute to compute the TE tunnel path
C. MPLS TE uses BGP extension to advertise link attributes
D. MPLS TE provides protection capability
E. MPLS TE uses RSVP to establish LSP








Correct Answer: ADE



QUESTION 69
Which of these is not a component of MPLS traffic engineering?

A. trunk admission control
B. forwarding traffic to tunnel
C. information distribution
D. path selection, calculation, and setup
E. traffic patterns prediction








Correct Answer: E



QUESTION 70
Which two statements about MPLS point-to-multipoint traffic engineering (P2MP TE) are true? (Choose two)

A. P2MP TE uses an OSPF extension that is different from the OSPF extension that is used in P2P TE.
B. Loose path is not supported in P2MP TE.
C. Multiple IP multicast groups can map to one P2MP tunnel.
D.Affinity is not supported in P2MP TE.
E. P2MP TE uses Constrained Shortest Path First (CSPF) to calculate paths.









Correct Answer: CE




QUESTION 71
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



QUESTION 72
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



QUESTION 73
Which statement about MPLS Traffic Engineering policy-based tunnel selection (PBTS) is not true?

A. The tunnel that is not configured with the policy-class command acts as the default.
B. EXP selection is between multiple tunnels to the same destination
C. There is no requirement for IGP extensions
D. Tunnels are configured using the policy-class command and carry multiple EXP values.
E. It supports VRF traffic, IP-to-MPLS switching, and MPLS-to-MPLS switching








Correct Answer: D



QUESTION 74
Which two models are the models of DiffServ-Aware Traffic Engineering? (Choose two)

A. Policy-based Model
B. Class based Model
C. Russian Doll Model
D. Global Tunnel Model
E. Maximum Allocation Model








Correct Answer: CE


QUESTION 75
Which three statements about the Cisco MPLS TE Fast Reroute (FRR) process are true? (Choose three.)

A. TE tunnels that are configured with the FRR option cannot be used as backup tunnels.
B. TE tunnels that are configured with the FRR option can be used as backup tunnels.
C. The backup tunnel that is used to protect a physical interface must have a valid IP address configured.
D. Interfaces must use MPLS global label allocation.
E. The source IP address of use backup tunnel and the merge point (MP) should not be reachable.








Correct Answer: ACD



QUESTION 76
Which statement about MPLS TE Fast Reroute (FRR) link protection operation is not true?
A. It requires a next-hop backup tunnel.
B. The backup tunnel terminates on the same tail-end router as the primary tunnel.
C. The point of local repair (PLR) swaps the label and pushes the backup label.
D. The restoration time is expected to be under 50 ms.
E. The backup tunnel can have associated bandwidth capacity








Correct Answer: B



QUESTION 77
Which statement about MPLS TE Fast Reroute (FRR) node protection operation is not correct?

A. It requires a next-next hop backup tunnel.
B. Point of local repair (PLR) swaps the next hop label and pushes the backup label.
C. The backup tunnel terminates on the merge point (MP) where traffic rejoins the primary tunnel.
D. The backup tunnel can have associated bandwidth capacity.
E. Restoration time is expected under 50 ms.









Correct Answer: E



QUESTION 78
With the BGP peerings shown, which 3 solutions are most correct? (Choose three.)



A. rtrA and rtrD are route-reflector-clients; rtrB and rtrC are route reflectors part of the same cluster. 
B. rtrA and rtrD are route-reflector-clients; rtrB and rtrC are route reflectors part of the different cluster. 
C. rtrA, rtrB and rtrC are part of a confederation sub-AS and rtrD is part of a different confederation sub-AS
D. rtrA, rtrB are part of one confederation sub-AS and rtrC, rtrD are part of a different confederation sub-AS
E. rtrA, rtrB and rtrC are part of a confederation sub-AS where rtrB is a route reflector and rtrA, rtrC are routereflector-clients.








Correct Answer: BDE

QUESTION 79
Referring to the exhibit, what could be preventing the R1 router from receiving any prefixes from the R2 BGP neighbor?


A. The neighbor 192.168.31.2 next-hop-self command is missing on R2
B. R1 is using the wrong remote AS number in its neighbor 192.168.31.1 remote-as configuration
C. There is a TCP session establishment problem between R1 and R2
D. The no sync command is missing on R1
E. The no sync command is missing on R2
F. There is a BGP version mismatch between R1 and R2









Correct Answer: B



QUESTION 80
Which BGP community is used to prevent the advertisement of the BGP prefix to other BGP peers?

A. no-advertise
B. additive
C. no-export
D. local-as
E. none







Correct Answer: A




QUESTION 81
What statement about Transit AS is true?

A. Traffic and prefixes originating from Transit AS are carried across a Stub AS to their Source AS.
B. None of the above.
C. Traffic and prefixes originating from Source AS are carried across a Transit AS to reach their destination AS.
D. Traffic and prefixes originating from Transit AS are carried across a Stub AS to their destination AS.








Correct Answer: C



QUESTION 82
In which state can BGP peers exchange Update messages?

A. OpenConfirm
B. OpenSent
C. Active
D. Idle
E. Established








Correct Answer: E

QUESTION 83
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 84
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




QUESTION 85
R3 and R4 are Route-Reflectors and there is an iBGP session between them, there is NO iBGP session between R1 and R2. For an External Route from CE-2 in
R2 to reach R1, which two statements are true?

A. R1, R3 and R4 establish full mesh iBGP sessions, R2, R3 and R4 establish full mesh iBGP sessions.
B. R1 acts as a Route-Reflector client to R3, R2 acts as a Route-Reflector client to R4.
C. R1 acts as a Route-Reflector client to R4, R4 acts as a Route-Reflector client to R3, R2 acts as a Route-Reflector client to R3.
D. CE-2 establishes multi-hop E-BGP sessions with R3 and R4.









Correct Answer: BC


QUESTION 86
Which three choices are BGP Extended communities used in MPLS-VPN deployment? (Choose three).
A. Site of Origin SOO
B. Route-Distinguisher
C. Route-Target
D. Domain Identifier








Correct Answer: ACD



QUESTION 87
What is the BGP synchronization rule?

A. BGP should not advertise a route until that route has been learned via an IGP.
B. Routing information received through an EBGP session is not forwarding to another EBGP neighbor, only to IBGP neighbors.
C. BGP neighbor peering are established and synchronized using TCP.
D. BGP should not advertise a route when that route has been learned via an IGP
E. Routing information received through an IBGP session is not forwarding to another IBGP neighbor, only to EBGP neighbors.






Correct Answer: A


:
QUESTION 88
router bgp 1 neighbor 1.1.1.1 remote-as 2
The above bgp configuration has what effect on the configured router?
A. Allows incoming TCP connections from 1.1.1.1 that are sourced from port 179
B.Allows incoming TCP connections from 1.1.1.1 that are destined to port 179
C. Allows incoming TCP connections sourced from port 179
D. Allows incoming TCP connections from 1.1.1.1 and destined to or sourced from port 179
E. Allows incoming TCP connections destined to port 179








Correct Answer: B



QUESTION 89
Refer to the exhibit. Which three statements describe r RIB-Failure in the show ip bgp command output? (Choose three.)



A. It is a redundancy route.
B. It is a route with a better administrative distance already present in IGP.
C. The number of routes in VRF exceeds the route limit that is configured under the VRF instance.
D. It is a rerouting entry
E. It indicates memory failure








Correct Answer: BCE



QUESTION 90
What best explains the BGP route-reflector function?
A. None of the above.
B. BGP route-reflector does not have to be in the forwarding path of data coming from its clients.
C. BGP route-reflector will stop reflecting the routes if they're not directly-connected clients.
D. BGP route-reflector should be in forwarding path of data coming from its clients.










Correct Answer: B

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