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Home Cisco® 300-515

Cisco® 300-515 Exam Practice Questions (P. 5)

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Question #21
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?
  1. A
    L2VPN with the broadcast traffic processed at the ingress PE.
  2. B
    L3VPN with direct LSP connectivity between all PEs.
  3. C
    L2VPN by encapsulating multiple frame formats with interworking.
  4. D
    L3VPN using a hierarchical topology of N-PEs and U-PEs.

Correct Answer:
D

Question #22
You are troubleshooting ARP connectivity issues for an Ethernet interface on an IOS XR network that runs IS-IS. You verify that the IGP protocol is running, but an
ARP entry has not yet been created.
Which action should you take?
  1. A
    debug ping packets
  2. B
    debug ARP
  3. C
    ping the connected neighbor
  4. D
    verify the RIB table routes

Correct Answer:
C

Question #23
Which two are characteristics of using a non-MPLS peer-to-peer model over a traditional overlay model? (Choose two.)
  1. A
    The model is suited for nonredundant configurations.
  2. B
    The configuration on a newly added site PE is updated automatically.
  3. C
    Provider routers know the customer network topology.
  4. D
    The customer specifies the exact site-to-site traffic profile.
  5. E
    Routing information is exchanged between the customer router and one or a few PEs.

Correct Answer:
CE
Reference:
http://etutorials.org/Networking/MPLS+VPN+Architectures/Part+2+MPLS-based+Virtual+Private+Networks/Chapter+7.+Virtual+Private+Network+VPN
+Implementation+Options/Overlay+and+Peer-to-peer+VPN+Model/

Question #24
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?
  1. A
    tag-rewrite on the ingress and egress PE router
  2. B
    interworking IP configuration on the last PE router before label disposition
  3. C
    nonrouted interworking setup to properly translate only the Layer 2 information from the AC
  4. D
    interworking IP configuration on both the AC terminations on the PEs

Correct Answer:
D
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

Question #25
Which mechanism reduces the network flooding caused by host ARP learning behavior?
  1. A
    ARP suppression
  2. B
    storm control
  3. C
    root guard
  4. D
    BPDU guard

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

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