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QUESTION 36
In which two Cisco IOS XR configuration modes can mpls ldp igp sync be configured? (Choose two.)
A. config-ldp
B. config-if
C. config-ospf-ar
D. config-ospf
E. config-isis

Correct Answer: CD Section: (none) Explanation
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Explanation:
QUESTION 37
On Cisco routers, which three methods can be used to map traffic into the MPLS traffic engineering tunnel? (Choose three.)
A. on-demand routing
B. static routing
C. optimized edge routing
D. policy-based routing
E. autoroute

Correct Answer: BDE Section: (none) Explanation
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QUESTION 38
Which three statements are correct regarding a Cisco MPLS TE? (Choose three.)
A. A Cisco MPLS TE tunnel maps onto an LSP path.
B. Tunnels are bidrectional by default.
C. Packets that are mapped into a Cisco MPLS TE tunnel will have two labels, with the top label indicating what the tail-end router should do with the packet.
D. A tunnel that is created with a priority of 0 can pre-empt an existing tunnel with a priority of 7.
E. CBR takes into account link resource and traffic tunnel attributes.
F. RSVP is used between customer routers.

Correct Answer: ADE Section: (none) Explanation
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QUESTION 39
On a Cisco router, when will the router actually reserve the bandwidth for the MPLS traffic engineering tunnel?
A. during the autoroute process
B. during constraint-based routing calculations
C. on the receipt of the RSVP Path message
D. on the receipt of the RSVP Resv message

Correct Answer: D Section: (none) Explanation
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QUESTION 40
Cisco MPLS TE path setup can be affected by which three tunnel attributes? (Choose three.)
A. bandwidth
B. delay
C. MTU
D. priority
E. affinity

Correct Answer: ADE Section: (none) Explanation
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Explanation:
QUESTION 41
When using the tunnel mpls traffic-eng path-option 1 explicit name test command in Cisco MPLS TE tunnel configurations, the test explicit-path configuration will consist of a list of which values?
A. tunnel endpoint
B. resource class affinity
C. MPLS label
D. IP address

Correct Answer: D Section: (none) Explanation
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Explanation:
QUESTION 42
Cisco MPLS TE resource attributes that are configured locally for each link are distributed to the headend router of the traffic engineering tunnel using which protocol?
A. BGP
B. MP-BGP
C. LDP
D. RSVP
E. OSPF or IS-IS with TE extension

Correct Answer: E Section: (none) Explanation
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QUESTION 43
When implementing Cisco MPLS TE, the constrained-based path calculations will use which value as the TE cost of each link within the MPLS domain?
A. By default, it will use the IGP metric, or each link can be assigned a specific value using the admin-weight command.
B. It can only use the IGP metric as the TE cost.
C. It will use the interface bandwidth as the TE cost.
D. Each link must be assigned a TE cost using the metric command.

Correct Answer: A Section: (none) Explanation
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QUESTION 44
Which affinity and mask value will match the link affinity that has 0x0F in the first 8 bits and 0x01 in the last 8 bits, and the middle 16 bits can be any value?
A. affinity 0x0F000001 mask 0x0F000001
B. affinity 0x0F000001 mask 0x00000000
C. affinity 0x0F000001 mask 0x11111111
D. affinity 0x0F000001 mask 0x11000011
E. affinity 0x0F000001 mask 0xFF0000FF
F. affinity 0x0F000001 mask 0x00FFFF00

Correct Answer: E Section: (none) Explanation
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QUESTION 45
Which two features are used to provide Cisco MPLS TE node and link protection? (Choose two.)
A. autoroute
B. fast reroute
C. backup tunnels
D. BFD

Correct Answer: BC Section: (none) Explanation
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QUESTION 46
In Cisco MPLS TE implementations, what can cause the tunnel bandwidth to adjust automatically based on the traffic load in the tunnel?
A. fast reroute
B. admin weight
C. autobandwidth
D. bandwidth subpool

Correct Answer: C Section: (none) Explanation
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QUESTION 47
Which affinity value will be matched by the affinity bit mask of the affinity 0xFF00000A mask 0xFFFF000F command?
A. 0xFFFF000A
B. 0xFF00EEEA
C. 0xFF000000
D. 0x00000000
E. 0x11110001

Correct Answer: B Section: (none) Explanation
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QUESTION 48
Refer to the Cisco IOS XR configuration exhibit.

Which statement is correct?
A. The backup tunnel-te 10 tunnel is using the highest setup and hold priority settings of 7.
B. The backup tunnel path is learned dynamically.
C. The fast-reroute command is missing under the (config-mpls-te-if)# configuration mode.
D. Interface gi0/0/0/10 is the protected link.

Correct Answer: D Section: (none)
Explanation
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QUESTION 49
When defining an explicit MPLS TE tunnel path, which two command options are available under the explicit-path configuration mode? (Choose two.)
A. exclude-address
B. include-address
C. next-address
D. dynamic-address

Correct Answer: AC Section: (none) Explanation
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QUESTION 50
Which three mechanisms are used to implement MPLS TE? (Choose three.)
A. tunnel interface
B. CSPF
C. RSVP
D. LDP
E. MP-BGP

Correct Answer: ABC Section: (none) Explanation
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QUESTION 51
Implementing IPoDWDM interfaces on Cisco CRS routers eliminates the need for which network component?
A. ROADM
B. external transponders
C. electrical-optical-electrical converters
D. electrical cross-connect

Correct Answer: B Section: (none) Explanation
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QUESTION 52
Layer 2 VPN services that are offered by traditional service providers using a SONET/SDH backbone can be implemented by service providers using an IP/MPLS backbone with which MPLS feature?
A. LSP stitching
B. AToM
C. virtual private WAN services
D. cell-mode MPLS

Correct Answer: B Section: (none) Explanation
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QUESTION 53
On Cisco routers, which QoS marker is only locally significant?
A. DSCP
B. MPLS EXP
C. IP precedence
D. QoS group
E. discard eligible (DE)

Correct Answer: D Section: (none) Explanation
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QUESTION 54
Which QoS mechanism is used for congestion avoidance?
A. LLQ
B. CBWFQ
C. WRED
D. LFI
E. traffic policing

Correct Answer: C Section: (none) Explanation
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Explanation:
QUESTION 55
Only based on the Cisco IOS XR policy-map configuration exhibit,

which statement is correct?
A. All DSCP AF41 marked packets will be dropped when the average queue length reaches 12,000 packets.
B. DSCP AF11 marked packets will be randomly dropped when the average queue length reaches 10,000 packets.
C. DSCP AF11 and AF41 marked packets are guaranteed a minimum bandwidth of 1 Mb/s.
D. DSCP AF11 and AF41 marked packets are guaranteed a maximum bandwidth of 1 Mb/s.

Correct Answer: B Section: (none) Explanation
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Explanation:
QUESTION 56
Referring to the show output exhibit,

which statement is correct?
A. The P1 router is receiving label information for the 10.0.2.1/32 prefix from two LDP peers.
B. The P1 router is receiving label information for the 10.7.1.1/32 prefix from two LDP peers.
C. The P1 router is using the IMP-NULL local label for the 10.7.1.1/32 prefix because 10.7.1.1/32 is the loopback interface IP address on the P1 router.
D. The P1 router will perform PHP for the 10.7.1.1/32 and 10.7.10.1./32 prefixes.

Correct Answer: B Section: (none) Explanation
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QUESTION 57
Referring to the traceroute output exhibit that is shown, which statement is correct?

A. There is no problem with the end-to-end LSP as indicated by the successful trace.
B. Normal PHP operation is performed by the hop 4 router.
C. The end-to-end LSP is broken at hop 4.
D. At each hop, each LSR is able to perform label swapping.

Correct Answer: C Section: (none) Explanation
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QUESTION 58
What is an important requirement with MPLS applications like Layer 3 MPLS VPNs?
A. All the PE routers loopback addresses should be summarized to reduce the number of routing table entries in the core routers.
B. Targeted hellos are required between all the PE routers.
C. An end-to-end LSP is required between the PE routers.
D. The LSPs that are built between the PE routers must be symmetrical (bidirectional).

Correct Answer: C Section: (none) Explanation
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QUESTION 59
When implementing MPLS TE tunnels on Cisco IOS XR routers, what is the tunnel setup and hold priority value range, and which value has the highest priority?
A. 0-63, where 0 is the highest priority
B. 0-63, where 63 is the highest priority
C. 0-7, where 0 is the highest priority
D. 0-7, where 7 is the highest priority

Correct Answer: C Section: (none) Explanation
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Explanation:
QUESTION 60
Which Cisco IOS XR command should be used in order to enable LDP on all interfaces for which the IGP protocol is enabled?
A. RP/0/0/CPU0:R1(config-ospf)#mpls ldp auto-config
B. RP/0/0/CPU0:R1(config-ospf)#mpls ldp interface all enable
C. RP/0/0/CPU0:R1(config-ospf)#enable all
D. RP/0/0/CPU0:R1(config-ldp)#enable all

Correct Answer: A Section: (none) Explanation Explanation/Reference:
Explanation:
QUESTION 61
Refer to the partial Cisco IOS XR configurations exhibit for Router 1 and Router 2.

There are two routers that are connected back to back over the Gigabit Ethernet link. If the “show mpls ldp neighbor” command output on Router 1 does not show LDP peering with Router 2, what could be the possible root cause of the LDP peering problem?
A. missing interface under OSPF IGP configuration
B. hello timers mismatch on Router 1 and Router 2
C. password for LDP session mismatch on Router 1 and Router 2
D. MPLS LDP session protection is not configured

Correct Answer: A Section: (none) Explanation
Explanation/Reference:
Explanation:
QUESTION 62
Which Cisco IOS XR command should be used to identify if MPLS TE FRR is enabled?
A. show mpls traffic-eng tunnel <tunnel#>
B. show mpls frr
C. show mpls traffic-eng protection
D. show mpls protection
E. show mpls fast-reroute

Correct Answer: A Section: (none) Explanation
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QUESTION 63
When a link flaps, an mpls ldp session will also flap. Which feature minimizes traffic loss and provides faster convergence after the link is re-established?
A. BFD
B. MPLS LDP IGP SYNC
C. graceful restart
D. LDP session protection
E. LDP nonstop routing

Correct Answer: D Section: (none) Explanation
Explanation/Reference:
Explanation:
QUESTION 64
A DSCP value of 41 in decimal corresponds to which IP precedence value?
A. 3 ?Flash
B. 4 ?Flash Override
C. 5 ?Critical
D. 6 ?Internet Control
E. 7 ?Network Control

Correct Answer: C Section: (none) Explanation
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QUESTION 65
DRAG DROP A.

B.
C.
D.