NEW 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

Answer: C

NEW QUESTION 2
Which three network services can be implemented using MPLS within the service provider IP NGN core? (Choose three.)

• A. Layer 2 VPNs
• B. Layer 3 VPNs
• C. traffic engineering
• D. IntServ traffic engineering tunnels
• E. encrypted LSPs

Answer: ABC

NEW QUESTION 3
Which three steps are required to configure QPPB on Cisco IOS XR routers? (Choose three.)

• A. Apply a QPPB route policy to the BGP process using the table-policy command
• B. Apply a QPPB route policy to the BGP neighbor using the route-policy command
• C. Define a QPPB route policy to match the customer routes, then set the IP precedence or qos-group
• D. Define a QPPB route policy to match the customer IP precedence or qos-group markings, then set the BGP community
• E. Enable QPPB on an interface using the ipv4 bgp policy propagation input ip-precedence|qos-group destination|source command
• F. Enable QPPB on an interface using the ipv4 bgp policy propagation output ip- precedence|qos-group destination|source command

Answer: ACE

Explanation: QoS Policy Propagation via BGP (QPPB), is a mechanism that allows propagation of quality of service (QoS) policy and classification by the sending party based on access lists, community lists and autonomous system paths in the Border Gateway Protocol (BGP), thus helping to classify based on destination instead of source address.

NEW QUESTION 4
Scenario:




From the PE8 router, how many total prefixes for have an incoming local label assigned (including the imp-null)?

• A. 45
• B. 21
• C. 66
• D. 22

Answer: B

Explanation: On PE8 issue: show mpls ip binding summary and look at "assigned in labels". That value is the correct answer NOT "learned out label".

NEW QUESTION 5
Which three mechanisms are used to implement MPLS TE? (Choose three.)

• A. tunnel interface
• B. CSPF
• C. RSVP
• D. LDP
• E. MP-BGP

Answer: ABC

Explanation: Constrained-Based Shortest Path First (CSPF).
Resource Reservation Protocol - Traffic Engineering is an extension of the resource reservation protocol (RSVP) for traffic engineering.

NEW QUESTION 6
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.

Answer: CDE

NEW QUESTION 7
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

Answer: D

NEW QUESTION 8
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

Answer: C

NEW QUESTION 9
Refer to the exhibit.

MPLS TE Tunnel 138 has a headend R1 and a tailend R4, and uses path R1-R2-R4 as the primary LSP. The path R1-R2-R3-R4 should be implemented as a backup LSP in case the R2-R4 link fails. To which interface should the appropriate configuration be applied to accomplish this?
A)

B)

C)

D)

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: C

NEW QUESTION 10
A recent analysis of a service provider network infrastructure revealed the necessity to reinforce bandwidth control over all the 5 Mbps residential customer contracts. Which option is a viable solution to rate limit customer’s bandwidth both upstream and downstream?

• A. class-based policing
• B. committed access rate on a per interface basis
• C. reserving 5 Mbps on Cisco MPLS TE tunnels that connect customers
• D. setting customer Ethernet links to 10 Mbps half-duplex

Answer: C

NEW QUESTION 11
Which statement defines how MPLS LDT Graceful Restart works after a service interruption?

• A. It works independent of neighboring routers to recover MPLS forwarding information
• B. It works by helping all neighboring MPLS LDP routers to recover MPLS forwarding information
• C. It works by helping neighboring routers with MPLS LDP SSO/NSF and Graceful Restart to recover MPLS forwarding information
• D. It works independent of neighboring non-LDP Graceful Restart routers to recover MPLS forwardinginformation

Answer: C

NEW QUESTION 12
Which item is not available to be used for QoS classification in Cisco IOS XR?

• A. MAC SA
• B. protocol
• C. inner EXP
• D. discard-class
• E. QoS-group
• F. VLAN

Answer: C

NEW QUESTION 13
DS-TE implementations on Cisco routers support which bandwidth pool(s) and class type(s)? (Choose two.)

• A. global pool only
• B. subpool only
• C. global pool and subpool
• D. class-type 0 only
• E. class-type 1 only
• F. class-type 0 and class-type 1

Answer: CF

Explanation: Differential Service Tunnels
Differential Service Traffic Engineering (TE) is an extension of the regular MPLS Traffic Engineering (MPLSTE) feature. Regular TE does not provide bandwidth guarantees to different traffic classes. A single bandwidth pool (global pool) is used in regular TE that is shared by all traffic. In order to support various class of service (CoS), the ability to provide multiple bandwidth pools is required. These bandwidth pools then can be treated differently based on the requirement for the traffic class using that pool.
In RSVP global and subpools reservable bandwidths are configured on a per interface basis to accommodate TE tunnels on the node. Available bandwidth from all configured bandwidth pools is advertised using Interior Gateway Protocol (IGP). RSVP is used to signal the TE tunnel with appropriate bandwidth pool requirements.

NEW QUESTION 14
Which QoS mechanism is used for congestion avoidance?

• A. LLQ
• B. CBWFQ
• C. WRED
• D. LFI
• E. traffic policing

Answer: C

NEW QUESTION 15
Scenario:




On CE7 which statement is correct regarding Traffic the QoS policy applied to the gi0/0 interface in the input direction?

• A. Traffic matching the "MARKING2" class-map will be marked with qos-group 5
• B. Traffic matching the "MARKING1" class-map will be marked with MPLS EXP 5
• C. All incoming packets not matched bythe"MARKING1" class-map will be dropped
• D. All incoming packets with the DSCP EF marking with be marked with MPLS EXP 0

Answer: B

Explanation: Issue: show policy-map interface gi0/0
First find out which policy-map is applied (it called something like QOSPOLICY1)
A is wrong. Class MARKING2 is indeed defined but not applied to that policy-map. There are two class-maps applied MARKING1 and class-default. Both will mark the traffic with MPLS EXP values.
default:
set mpls experimental imposition 0 MARKING1
set mpls experimental imposition 5

NEW QUESTION 16
Scenario:




On CE 7 router, which statement is correct regarding the "QOS-POLICY policy map configurations?

• A. Traffic matched bythe"QOS-HTTP-1" class-map is shaped to an average is rate of 2560000 128000bps
• B. Traffic matched bythe"QOS1-HTTP-2" class-map will be queued in the low-latency- queue which has a maximum bandwidth guarantee of 64000
• C. Traffic matched by the "QOS-FTP-1" class-map can't use more than 256 Kbps under any condition
• D. The "QOS-POLICY is applied to the gi0/0 interface in the input direction

Answer: C

Explanation: # show policy-map
# show policy-map interface x/y
# show running-config policy-map

NEW QUESTION 17
Which two values are class-selector DSCP values? (Choose two.)

• A. 001001
• B. 000111
• C. 111000
• D. 100000
• E. 000001

Answer: CD

NEW QUESTION 18
Which configuration fulfills the requirement of configuring LDP with Cisco Nonstop Forwarding on a router with 5 minutes time to hold the forwarding table information and 1 minute retry timer value for an LDP connection?

• A. mpls ldp graceful-restartgraceful-restart forwarding state-holdtime 5 graceful-restart reconnect-timeout 1 interface GigabitEthernet0/0/0/0!
• B. mpls ldp graceful-restartgraceful-restart forwarding state-holdtime 300 graceful-restart reconnect-timeout 60 interface GigabitEthernet0/0/0/0!
• C. mpls ldp nsrgraceful-restartgraceful-restart forwarding state-holdtime 300 graceful-restart reconnect-timeout 60 interface GigabitEthernet0/0/0/0!
• D. mpls ldp nsrgraceful-restartgraceful-restart forwarding state-holdtime 5 graceful-restart reconnect-timeout 1 interface GigabitEthernet0/0/0/0!

Answer: B