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Question 1:
An engineer looks at packet captures and sees that the MPLS header field of a packet indicates a bottom of stack field of 0. What can the engineer conclude from this information?
A. The packet is an AToM packet
B. One label is on the packet
C. At least one more MPLS label is on the packet
D. No labels are on the packet
Correct Answer: C
Question 2:
Which option is the correct definition of the LB on a Cisco router?
A. a table used by switching functions to forward labeled packets
B. a table that holds the next hop for destination prefixes
C. a label-based adjacency table
D. a table that stores remote and local label bindings
Correct Answer: A
Question 3:
When configuring class-based WRED on Cisco routers, which WRED parameter is not user configurable on a Cisco IOS XR but is user configurable on a Cisco IOS and IOS XE?
A. the ingress or egress direction where the class-based WRED policy will be applied
B. the maximum threshold
C. the minimum threshold
D. the mark probability denominator
Correct Answer: D
Question 4:
Referring to the Cisco IOS XR show command output exhibit, what are three possible reasons that the GigabitEthernet0/1/0/10 LDP IGP sync status is not ready? (Choose three.)
A. GigabitEthernet0/1/0/10 is not configured to run LDP.
B. Graceful restart is not configured on the peer.
C. The LDP neighbor on GigabitEthernet0/1/0/10 is not up.
D. The OSPF neighbor on GigabitEthernet0/1/0/10 is not up.
E. LDP is up on GigabitEthernet0/1/0/10, but no label bindings have been received from the peer.
F. GigabitEthernet0/1/0/10 is a member link of Bundle-Ether9000.
Correct Answer: CDE
Question 5:
Which Cisco IOS XR high-availability feature is used to prevent routes from being used before LDP converges?
A. LDP session protection
B. LDP-IGP synchronization
C. BFD
D. IGP session protection
Correct Answer: B
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Question 6:
An engineer must automatically copy the IP Prec/DiffServ PHB marking to the EXP bits of the imposed MPLS label on the ingress PE, as well as the MPLS EXP bits to the IP Prec/DiffServ of the egress PE. Which MPLS QoS model is suitable for this requirement?
A. pipe model
B. short-pipe model
C. uniform model
D. uniform pipe model
Correct Answer: C
Question 7:
Which two values are class-selector DSCP values? (Choose two.)
A. 001001
B. 000111
C. 111000
D. 100000
E. 000001
Correct Answer: CD
Question 8:
The network architecture team is proposing to enable Cisco MPLS TE over the entire service provider core network. Which two options are benefits of Cisco MPLS TE that affect their decision? (Choose two.)
A. Cisco MPLS TE optimizes network resources.
B. Cisco MPLS TE data flows independent from the underlying IGP.
C. Cisco MPLS TE increases the data forwarding rate.
D. Cisco MPLS TE tunneling does not require maintenance.
E. Cisco MPLS TE offers network resource reservation, which removes any need for QoS MQC policies.
Correct Answer: AB
Question 9:
What is a crucial LDP default operating behavior?
A. LDP uses the solicited mode by default. An LDP label request is sent to the FIB next hop LSR. When the egress router receives the request, it returns message with all the label-mapping information for the LSP is generated.
B. LDP establishes a TCP session between the PE routers, thus providing label mapping for the LSP
C. LDP uses downstream unsolicited mode by default. An LSR advertises label mappings to peers without being asked
D. LDP uses UDP-confirmed messages to establish sessions between PE ingress and egress routers. The UDP messages encode the label information for each LSP and sub- LSP link
Correct Answer: C
Question 10:
Refer to the exhibit. Which configuration error prevents this traffic-shaping policy from working?
A. The WAN interface is starting to drop packets because no queuing mechanism is implemented.
B. Traffic-shaping policies are applied only in the outbound direction.
C. The class_A configuration shape peak is used to maximize the serial interface performances.
D. The service-policy command is applied only on logical or channeled interfaces.
Correct Answer: B
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