Cisco 642-887 Online Practice Questions and Exam Preparation

Cisco 642-887 Online Questions & Answers

• Question 31:

  

  Refer to the exhibit. Based on the raw format of an MPLS header captured by a traffic analyzer, what is the value of the MPLS EXP field?

  A. 1
  B. 255
  C. 5
  D. 29
  C. 5

• Question 32:

  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
  A. RP/0/0/CPU0:R1(config-ospf)#mpls ldp auto-config

• Question 33:

  Refer to the exhibit.

  

  You are about to implement security features, including this configuration, within the MPLS network of a large MPLS service provider. How does the router distribute the labels to its neighbors?

  A. All network 10.100.0.0/24 labels are sent to all TDP neighbors
  B. All network 10.100.0.0/16 labels are sent to all LDP neighbors
  C. All network 10.100.0.0/24 labels are sent to all LDP neighbors
  D. All network 10.100.0.0/24 labels are sent to all LDP and TDP neighbors
  C. All network 10.100.0.0/24 labels are sent to all LDP neighbors

• Question 34:

  Which queuing mechanism should an engineer implement on delay sensitive categories of traffic?

  A. weighted fair
  B. priority
  C. low-latency
  D. weighted round-robin
  C. low-latency

• Question 35:

  Scenario: On PE7 which statement is correct regarding the "traffic-policing" policy-map?

  

  

  A. The "traffic-policing" QoS policy is applied to the Gi0/0/0/0 interface in the outbound direction.
  B. The "traffic-policing" QoS policy will police the traffic matched by the "test12" ACL to 3 mbps and will drop all exceeding traffic.
  C. All incoming traffic not matched by the "test12" ACL to the Gi0/0/0/0 interface will be dropped.
  D. The "traffic-policing" QoS policy is using dual rate class-based traffic policing.
  B. The "traffic-policing" QoS policy will police the traffic matched by the "test12" ACL to 3 mbps and will drop all exceeding traffic.

  ---

  #show running-config policy-map #show policy-map

• Question 36:

  According to the Intserv model, which two options are traffic-specific parameters? (Choose two.)

  A. token bucket
  B. calculated average queue size
  C. minimum policed unit
  D. traffic marking
  E. rate policing
  A. token bucket
  C. minimum policed unit

• Question 37:

  When implementing CBWFQ, where should Weighted Random Early Detection configuration be applied?

  A. route-map
  B. policy-map
  C. class-map
  D. service-policy
  B. policy-map

• Question 38:

  Which two values must be specified in a Cisco NBAR configuration? (Choose two.)

  A. port number
  B. IP precedence
  C. neighbor discovery address
  D. CoS
  E. transport protocol
  A. port number
  E. transport protocol

• Question 39:

  A company is experiencing congestion on Internet T1 links that transport site-to-site IPsec tunnels between head offices. QoS configuration is being modified on these T1 links. Which option describes the result from this QoS configuration?

  A. VPN traffic is unaffected because the inner ToS field is encrypted and hidden from the policy
  B. The physical interface is affected by the new QoS configuration
  C. The internal VPN logical interface reflects the new QoS service policy
  D. IPsec protocol applications work independently of the QoS configuration
  A. VPN traffic is unaffected because the inner ToS field is encrypted and hidden from the policy

• Question 40:

  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
  E. OSPF or IS-IS with TE extension