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NEW QUESTION 1
Which two protocols facilitate label bindings by neighboring routers? (Choose two.)

  • A. IS-IS
  • B. LDP
  • C. OSPF
  • D. EIGRP
  • E. BGP

Answer: BE

NEW QUESTION 2
Refer to the partial Cisco IOS XR configurations exhibit for Router 1 and Router 2.
642-887 dumps exhibit
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

Answer: A

NEW QUESTION 3
An engineer has been tasked to configure a guaranteed 10 Mbps priority queue for traffic matched by class-map VOICE_CLASS on Cisco IOS XR. Which policy must be applied for outgoing traffic on interface FastEthernet 0/0/1?

  • A. configurepolicy-map VOICE_POLICY class VOICE_CLASSpolice rate 10000 exceed-action drop exitpriority level 1 exitexitinterface FastEthernet 0/0/1service-policy output VOICE_POLICY commit
  • B. configurepolicy-map VOICE_POLICY class VOICE_CLASS priority percent 10exit exitinterface FastEthernet 0/0/1service-policy output VOICE_POLICY commit
  • C. configurepolicy-map VOICE_POLICYclass VOICE_CLASS police rate 1000 exceed-action drop exitpriority level 1 exitexitinterface FastEthernet 0/0/1service-policy output VOICE_POLICY commit
  • D. configurepolicy-map VOICE_POLICY class VOICE_CLASSpolice rate 10 Mbps exceed-action shape exitpriority level 1 exitexitinterface FastEthernet 0/0/1service-policy output VOICE_POLICY commit

Answer: A

NEW QUESTION 4
Which protocol is used to send MPLS OAM traffic over an MPLS network?

  • A. ICMP
  • B. IP protocol number 137
  • C. TCP
  • D. UDP

Answer: D

NEW QUESTION 5
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

Answer: CD

NEW QUESTION 6
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

Answer: E

NEW QUESTION 7
A service provider runs MPLS in its core. What is the relationship between FIB, LIB, and LFIB in this
environment?

  • A. Data from the FIB and LIB tables is used to generate the LFIB
  • B. The FIB, LIB, and LFIB are populated independently
  • C. The LIB and FIB are populated with labels and next-hop attributes in the control plane and are used topopulate the LFIB
  • D. The LFIB is populated with information from the IP routing table and is shared with the FIB and LIB toassign labels to the path

Answer: A

NEW QUESTION 8
Which two factors must you consider when configuring MPLS EXP? (Choose two.)

  • A. MPLS EXP marking is supported in the egress direction
  • B. A packet that IP ToS classifies at ingress can be reclassified by MPLS EXP at egress
  • C. MPLS EXP marking is supported in the ingress direction
  • D. MPLS EXP classification for bridged MPLS packets on EVCs is supported
  • E. A packet that MPLS classifies at ingress can be reclassified by IP ToS at egress

Answer: CE

NEW QUESTION 9
Which two interface types can support qos pre-classify (Choose two.)

  • A. virtual templates
  • B. tunnel interfaces
  • C. FastEthernet
  • D. FDDI

Answer: BC

NEW QUESTION 10
Which statement describes the QoS behavior between P and PE routers of an MPLS provider network for an L3VPN service?

  • A. The PE function honors DSCP markings set by the CE.
  • B. The customer and provider must agree on DSCP classification and traffic priorities.
  • C. Classification of customer traffic is handled by the P router.
  • D. The PE function cannot map DSCP markings to MPLS EXP bits.

Answer: B

NEW QUESTION 11
At which layer does Cisco recommend the QoS trust boundary be set for an enterprise network environment?

  • A. core layer, facing the distribution layer
  • B. distribution layer, facing the access layer
  • C. access layer, facing the end hosts
  • D. distribution layer, facing the core layer

Answer: C

NEW QUESTION 12
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

Answer: E

NEW QUESTION 13
Which three options are class maps able to match? (Choose three.)

  • A. match access-group
  • B. match protocol http url "*cisco"
  • C. match destination-port
  • D. match DSCP
  • E. match all
  • F. match mac-address

Answer: ABD

NEW QUESTION 14
An engineer wants to implement constraint-based routing. Which MPLS application should the engineer use?

  • A. unicast IP routing
  • B. MPLS VPN
  • C. MPLS TE
  • D. RSVP

Answer: C

NEW QUESTION 15
On a Cisco IOS XR router, which mechanism protects the router resources by filtering and policing the packets flows that are destined to the router that is based on defined flow-type rates?

  • A. LLQ
  • B. LPTS
  • C. Committed Access Rate
  • D. Control Plane Policing
  • E. Management Plane Protection
  • F. NetFlow
  • G. ACL

Answer: B

Explanation: Local Packet Transport Services (LPTS) maintains tables describing all packet flows destined for the secure domain router (SDR), making sure that packets are delivered to their intended destinations.
The Low Latency Queueing feature brings strict priority queueing to Class-Based Weighted Fair Queueing (CBWFQ).

NEW QUESTION 16
What are the four fields inside the MPLS shim header? (Choose four.)

  • A. EXP
  • B. TTL
  • C. Version
  • D. S
  • E. Length
  • F. Label
  • G. Type
  • H. FCS

Answer: ABDF

NEW QUESTION 17
Refer to the exhibit.
642-887 dumps exhibit
What is the available reservable bandwidth for P6 after successful establishment of Tunnel 1?

  • A. 490 Kbps
  • B. 500 Kbps
  • C. 490 Mbps
  • D. 500 Mbps

Answer: D

NEW QUESTION 18
Which method is used to mark traffic matched by class-map MY_CLASS as Expedited Forwarding?

  • A. set ip dscp cs7
  • B. set dscp cs7
  • C. set dscp 46
  • D. set dscp 45

Answer: C

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