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问题 #1

How does Layer 3 VPN traffic traverse an ISP network?

A. Devices on the network use MPLS labels to share VPN routes between P routers in the network.

B. Devices on the network use LSAs to share routes between P routers in the network.

C. Devices on the network use MPLS labels to move VPN traffic through the network.

D. Devices on the network use GRE tunnels to move traffic between VRFs.

正确答案：C

问题 #2

An engineer is investigating an EVPN traffic flow issue. Which type of traffic should the engineer allow in an EVPN Tree Service in order to fix this issue?

A. known unicast from a leaf to another leaf

B. unknown unicast from a leaf to another leaf

C. multicast from a leaf to another leaf

D. known unicast from a root to another root

正确答案：AD

问题 #3

A network engineer has been called to configure the four PE devices in order to enable full communication among the four CE devices connected to them. While starting to configure, he experienced a connectivity issue. Which two tasks should the engineer perform in order to begin the process correctly? (Choose two.)

A. Configure PE3 to export route-targets 100:1 and 200:2.

B. Configure PE3 to import route-targets 100:1 and 200:2.

C. Configure PE4 to import route-targets 101:1 and 202:2.

D. Configure PE2 to export route-targets 300:3 and 400:4.

E. Configure PE1 to import route-targets 300:3 and 400:4.

正确答案：A

问题 #4

In a typical service provider environment, which two tools are used to help scale PE router connectivity requirements? (Choose two.)

A. route reflectors

B. VPNv4 address family

C. originator ID

D. cluster ID

E. confederations

正确答案：D

问题 #5

Which statement about this output is true?

A. The router IP 192.168.1.2 sent an implicit null, and the output is from the penultimate LSR.

B. The adjacent router is the egress LSR and has mpls ldp explicit-null configured.

C. The adjacent LSR router configured mpls label range 0.

D. The zero in the second column is the normal behavior of an egress router LSR.

正确答案：C

问题 #6

Refer to the exhibit. An organization is running H-VPLS on a network comprising four routers in a hub-and-spoke topology with R1 as the hub An engineer added a new spoke with multiple VCs to the network, and now traffic cannot flow properly How should the engineer update the configuration on R1 to correct the problem?

A. Disable spanning tree to allow loops to occur within the hub-and-spoke topology.

B. Disable split horizon to allow multiple VCs per spoke.

C. Disable Cisco Discovery Protocol to allow MPLS to share labels between the designated spokes.

D. Disable Cisco Discovery Protocol to allow for neighbor discovery.

正确答案：B

问题 #7

An engineer is investigating an MPLS LDP issue. Which command should an engineer use on a Cisco IOS XE device to display the contents of the LFIB?

A. show mpls forwarding- table

B. show mpls ldp neighbors

C. show mpls ldp labels

D. show mpls ldp bindings

正确答案：AE

问题 #8

Topic 1An engineer is investigating an EVPN traffic flow issue. Which type of traffic should the engineer allow in an EVPN TreeService in order to fix this issue?

A. known unicast from a leaf to another leaf

B. unknown unicast from a leaf to another leaf

C. multicast from a leaf to another leaf

D. known unicast from a root to another root

正确答案：D

问题 #9

Topic 1Which two frames can be configured on an Ethernet flow point? (Choose two.)

A. of a specific VLAN

B. with different type of service values

C. with identical type of service value

D. with different class of service values

E. with no tags

正确答案：AE

问题 #10

Topic 1An engineer is investigating an MPLS LDP issue. Which command should an engineer use on a Cisco IOS XE device todisplay the contents of the LFIB?

A. show mpls forwarding-table

B. show mpls ldp neighbors

C. show mpls ldp labels

D. show mpls ldp bindings

正确答案：A

问题 #11

An engineer is implementing an MPLS P2MP TE solution. Which type of router can serve as themidpoint router and the tailend router in this P2MP TE network implementation?

A. headend

B. source

C. transit

D. bud

正确答案：D

问题 #12

Which statement about this output is true?

A. The router IP 192.168.1.2 sent an implicit null, and the output is from the penultimate LSR.

B. The adjacent router is the egress LSR and has mpls ldp explicit-null configured.

C. The adjacent LSR router configured mpls label range 0.

D. The zero in the second column is the normal behavior of an egress router LSR.

正确答案：B

问题 #13

Which utility can you use to validate an LSP in an MPLS environment?

A. uRPF

B. MPLS LSP ping

C. logging

D. RSVP

正确答案：B

问题 #14

Topic 1Which tool identifies the point of failure in a P2MP LSP from the ingress LSR?

A. Jitter TLV

B. SPAN

C. P2MP traceroute

D. P2MP ping

正确答案：C

问题 #15

Refer to the exhibit. What is shown in this output?

A. local and outgoing abels are updated in hardware.

B. BGP is used between neighbors that are exchanging MPLS labels.

C. LDP neighbor statuses.

D. the labels received and advertised on PE1.

正确答案：D

问题 #16

An engineer is implementing an MPLS P2MP TE solution. Which type of router can serve as the midpoint router and the tailend router in this P2MP TE network implementation?

A. headend

B. source

C. transit

D. bud

正确答案：AB

问题 #17

Topic 1An ISP provides a major client MPLS VPN for managed services. The MPLS engineering team needs to use the advancedVPN feature of selective VRF import so that only specific prefixes are present in the required VPNs.Which aspect of this feature must the team consider?

A. A route must pass the import route map first and then the route target import filter.

B. The routers that are imported in the VRF can be BGP and IGP routes, so other match conditions in the route map, besides communities, can be used.

C. The import-map command is applied under the PE interface that connects to the CE router.

D. A route is imported into the VRF only when at least one RT that is attached to the route matches one RT that is configured in the VRF and the route is permitted by the import route map.

正确答案：D

问题 #18

An engineer noticed that PE3 is failing to accept IPv6 traffic information from PE1 The engineer confirmed that both PE3 and PE1 routers are configured accurately with IPv6 protocol To eliminate IPv6 traffic loss issue, which action must the engineer take to solve the problem?

A. Disable 6PVE that provides local IPv6 reachability over MPLS.

B. Configure 6PE that provides global IPv6 reachability over IPv4 MPLS.

C. Allow PE routers use the MP-iBGP extensions in the IPv6 network configuration to exchange IPv6 reachability information.

D. Configure 6PE forwarding between 6PE routers based on the IPv6 header.

正确答案：B

问题 #19

What is a requirement to share VRF reachability information to all members of a VPN when using IPv6?

A. PE and CE routers must be running BGP as the PE-CE routing protocol.

B. PE routers must have MPLS disabled and be running MP-BGP between all P and PE routers.

C. PE routers must be running MP-BGP and bgp default ipv4-unicast must be disabled.

D. All PEs must have the same VRFs configured.

正确答案：D

问题 #20

Topic 1In a typical service provider environment, which two tools are used to help scale PE router connectivity requirements?(Choose two.)

A. route reflectors

B. VPNv4 address family

C. originator ID

D. cluster ID

E. confederations

正确答案：AE

问题 #21

An engineer needs to improve MPLS network management by implementing a set of tools to support the NOC engineers in troubleshooting network failures. Which feature should the engineer implement to check the connectivity of the MPLS LSP between the ingress and egress PE routers?

A. MPLS OAM

B. MPLS-TP

C. LDP autodiscovery

D. extended ping

正确答案：A

问题 #22

An engineer is troubleshooting an ongoing network outage. Which command should he use that can display the live log files for a process or service running on a network device?

A. traceroute

B. show run

C. ping

D. debug

正确答案：D

问题 #23

Topic 1In an Ethernet Virtual Circuit environment, which restriction do bridge domains have when STP is running?

A. The STP mode must be RSTP or PVST+

B. Bridge domains must be mapped to a different VLAN.

C. The STP mode must be MSTP

D. Bridge domains must belong to different MST instances.

正确答案：C

问题 #24

If the two devices are operating normally, which two conclusions can you draw from this configuration? (Choose two.)

A. CE1 must use OSPF to establish a neighbor relationship with PE1.

B. PE1 labels the routes it learns from CE1 with the route-target 222:2 and shares them with its VPNv4 peers.

C. PE1 labels the routes it learns from CE1 with the route-target 111:1 and shares them with its VPNv4 peers.

D. The PE-CE routes between the devices are being exchanged by OSPF

E. CE1 is supporting CSC.

正确答案：BD

问题 #25

Topic 1An engineer is troubleshooting an ongoing network outage. Which command should he use that can display the live log filesfor a process or service running on a network device?

A. traceroute

B. show run

C. ping

D. debug

正确答案：D

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