Lead2pass 642-887 Exam Questions Free Download.v.2018-3-30.190q:
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QUESTION 151
Which two options are true regarding the Pipe and Short Pipe MPLS tunneling models? (Choose two.)
A. In Short Pipe mode QoS is done on the PE-to-CE link based on the customer’s PHB markings
B. In Pipe mode QoS is done on the PE-to-CE link based on the service provider’s PHB markings
C. In Pipe mode QoS is done on the PE-to-CE link based on the customer’s PHB markings
D. In Short Pipe mode QoS is done on the PE-to-CE link based on the service provider’s PHB markings
E. Short Pipe mode does not need MPLS usage, but Pipe mode does
Answer: AB
QUESTION 152
Refer to the 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
QUESTION 153
How is bandwidth recalculated when utilizing the automatic bandwidth adjustment feature for MPLS TE?
A. The tunnel’s output average is periodically sampled and then the bandwidth is adjusted to the largest sample obtained during the period, or to the configured maximum
B. The tunnel’s output is sampled and then the bandwidth is adjusted by a configured percentage until the configured maximum value is reached
C. Ping is used to measure congestion and the bandwidth is adjusted by a configured percentage until the maximum value is reached
D. Ping is used to measure congestion and the bandwidth is adjusted to either the minimum, average, or maximum configured bandwidth value
Answer: A
QUESTION 154
Which two advantages are reasons that service providers might deploy MPLS? (Choose two.)
A. to avoid using IGP in the core
B. to facilitate smooth migrations between legacy WAN technologies
C. to reduce the throughput overhead of full IPv4/IPv6 headers when traversing the core
D. to reduce the computational requirements that are placed on router CPUs
E. to reduce configuration and feature requirements in the core
Answer: CD
QUESTION 155
In Cisco IOS, what must be configured to ensure that an MPLS TE tunnel becomes active?
A. layer 3 addressing on the tunnel, to establish bidirectional communication over the tunnel
B. the tunnel for autoroute, to ensure proper installation into the forwarding plane
C. a path-option configuration, for either dynamic or explicit paths
D. the tunnel with a minimum bandwidth value, to properly calculate CSPF
Answer: A
QUESTION 156
Which option shows how a class map is implemented that matches only packets originating from the network 10.0.0.0/8, which are not marked as VoIP on Cisco IOS XE?
A. 
B. 
C. 
D. 
Answer: B
QUESTION 157
An engineer is having a problem getting an operational 10 Gigabit link on a Cisco ASR 9000 series router. The service provider instructs the engineer to use an LR optic. The engineer must access the router remotely.
Which command should the engineer issue to determine that the correct optic has been installed?
A. show controllers
B. show module optics
C. show ip interface
D. show optics
Answer: A
QUESTION 158
Which message is sent through the desired LSP path by the headend router and is used to determine available resources?
A. PATH
B. TENT
C. RSVP
D. RESV
Answer: A
QUESTION 159
An engineer sets up QoS over MPLS networks. How many classes of traffic can one LSP support?
A. as many as 8, because the EXP field is 3 bits
B. as many as 3, because the EXP field is 3 bits
C. as many as 64, because the DSCP field is 6 bits
D. as many as 6, because the DSCP field is 6 bits
Answer: A
QUESTION 160
An engineer deployed a Cisco MPLS TE next-hop protection over a switched environment. While testing the link protection, an excessive IGP delay in the reconvergence time is seen.
Which action fixes this issue?
A. Replace the existing link with a routed back-to back link
B. Configure object tracking
C. Set up more aggressive IGP timers
D. Implements BFD on the link
Answer: B
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