300-515無料試験問題と解答PDF最新問題2023年11月 [Q50-Q68]

300-515無料試験問題と解答PDF最新問題2023年11月

最新300-515試験問題集で最近更新された87問題

質問 # 50
Refer to the exhibit.

What is shown in this output?

A. the labels received and advertised on PE1
B. BGP is used between neighbors that are exchanging MPLS labels
C. local and outgoing abels are updated in hardware
D. LDP neighbor statuses

正解：A

質問 # 51
In MPLS Layer 3 VPN implementations, what is used on the PE router to isolate potential overlapping routing information between different customers?

A. pseudowire classes
B. VRFs
C. route targets
D. VC IDs
E. pseudowire IDs

正解：B

質問 # 52
Which optional information can be included with an IPv6 ping to support the troubleshooting process?

A. IPv4 IP address
B. source MAC address
C. destination MAC address
D. IPv6 hostname

正解：D

質問 # 53
Which statement describes the no bgp default route-target filter

A. Prefixes that are received with route targets that are not imported at the PE are accepted.
B. Prefixes that are received with route targets that are not imported at the PE are not accepted.
C. Prefixes that are received with route targets and distinguisher are accepted.
D. Prefixes that are received with route targets and distinguisher are not accepted.

正解：A

質問 # 54
While configuring the VRF Selection feature, you get an error message after typing the below statement:
Router(config)#no vrf selection source 172.16.0.0 255.255.0.0 vrf VRF1
Which action caused this message?

A. an attempt to configure a VRF Selection table that does not exist
B. an attempt to configure a VRF instance on an interface that already has VRF Selection configured
C. an attempt to remove a VRF Selection entry that does not exist
D. the entry of an inconsistent IP address and mask for VRF Selection

正解：C

解説：
Section: VPN Architecture
Explanation/Reference: https://www.cisco.com/c/en/us/td/docs/ios/12_2/12_2sz/feature/guide/122szvrf.html

質問 # 55
What do EVPN single-active and all-active have in common?

A. They are both roles that a designated router can take when MPLS is used with EVPN.
B. They are used to provide single connection from a CE device to a service provider.
C. They are multihoming mechanisms used for CE devices.
D. They are default gateway redundancy options.

正解：A

質問 # 56
Refer to the exhibit.

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 PE1 to import route-targets 300:3 and 400:4.
B. Configure PE4 to import route-targets 101:1 and 202:2.
C. Configure PE3 to export route-targets 100:1 and 200:2.
D. Configure PE2 to export route-targets 300:3 and 400:4.
E. Configure PE3 to import route-targets 100:1 and 200:2.

正解：C、E

質問 # 57
Which two Layer 2 VPN methods support interworking between customer sites with different Layer 2 encapsulation at each end (for example, Frame Relay to Ethernet interworking)? (Choose two.)

A. AToM
B. GET VPN
C. VPLS
D. L2TPv3

正解：A、D

質問 # 58
The CTO of a company requires the support of a network consultant to deliver an MPLS solution without resigning to a certain degree of redundancy and scalability. Which solution effectively scales to hundreds or thousands of sites?

A. L3VPN with direct LSP connectivity between all PEs.
B. L3VPN using a hierarchical topology of N-PEs and U-PEs.
C. L2VPN with the broadcast traffic processed at the ingress PE.
D. L2VPN by encapsulating multiple frame formats with interworking.

正解：B

解説：
Section: VPN Architecture

質問 # 59
Which utility can you use to validate an LSP in an MPLS environment?

A. RSVP
B. logging
C. MPLS LSP ping
D. uRPF

正解：C

質問 # 60
What is the primary function of a VRF on a router?

A. It enables a router to run BGP and a distance vector routing protocol at the same time, which allows it to serve as a VPN endpoint between remote sites.
B. It enables the router to support multiple separate routing tables, which allows the device to handle overlapping IP addresses.
C. It enables the router to provide faster switching through the network by using labels to identify the input and output interfaces for neighbor routers.
D. It enables a router to configure VLANs locally, which provides segregation between networks.

正解：B

解説：
Section: VPN Architecture

質問 # 61
Refer to the exhibit. Which effect of this configuration is true?

A. It configures VPWS multihomed.
B. It configures an IPv4 peering with 192.168.1.1
C. It configures VPWS single homed.
D. It configures MPLS traffic engineering.

正解：C

質問 # 62
Which mechanism reduces the network flooding caused by host ARP learning behavior?

A. root guard
B. storm control
C. ARP suppression
D. BPDU guard

正解：C

解説：
Reference:
https://www.cisco.com/c/en/us/products/collateral/switches/nexus-7000-series-switches/white- paper-c11-735015.html

質問 # 63
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 split horizon to allow multiple VCs per spoke
B. Disable spanning tree to allow loops to occur within the hub-and-spoke topology.
C. Disable Cisco Discovery Protocol to allow for neighbor discovery
D. Disable Cisco Discovery Protocol to allow MPLS to share labels between the designated spokes

正解：A

質問 # 64
You try to configure MPLS VPN VRF Selection based on a source IP address on an interface that has VRF configured, but you receive an error.
Which action must you take to correct the problem?

A. Configure static routes for the VRF.
B. Change the source IP address.
C. Remove the VRF from the interface.
D. Add the IP address to the VRF table.

正解：C

解説：
Reference:
https://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/vrfselec.html

質問 # 65
Refer to the exhibit.

Which statement about this output is true?

A. The adjacent router is the egress LSR and has mpls ldp explicit-null configured.
B. The adjacent LSR router configured mpls label range 0.
C. The zero in the second column is the normal behavior of an egress router LSR.
D. The router IP 192.168.1.2 sent an implicit null, and the output is from the penultimate LSR.

正解：A

質問 # 66
While troubleshooting an AToM L2VPN service, a network consultant notices that the AC Layer 2 encapsulations are different. Which action should the consultant take in order to make the MPLS L2VPN work?

A. interworking IP configuration on the last PE router before label disposition
B. interworking IP configuration on both the AC terminations on the PEs
C. nonrouted interworking setup to properly translate only the Layer 2 information from the AC
D. tag-rewrite on the ingress and egress PE router

正解：B

解説：
Reference:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_l2_vpns/configuration/xe-16-11/mp-l2-vpns- xe-16-11-book/l2vpn-interworking.html

質問 # 67
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 split horizon to allow multiple VCs per spoke
B. Disable spanning tree to allow loops to occur within the hub-and-spoke topology.
C. Disable Cisco Discovery Protocol to allow for neighbor discovery
D. Disable Cisco Discovery Protocol to allow MPLS to share labels between the designated spokes

正解：A

質問 # 68
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