Alcatel-lucent Scalable IP Networks Mpls

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  • 1/15 Questions

    The most commonly used label distribution protocol is _____.

    • OSPF
    • BGP
    • LDP
    • Option 4
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About This Quiz


Preparing for the Network Routing Specialist I (NRS I) Certification Exam (4A0-100)

Alcatel-lucent Scalable IP Networks Mpls - Quiz

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  • 2. 

    The VPN service that appears to the customer as a private routed network is _____.

    • VPNM

    • VPRN

    • VPLS

    • VPWS

    Correct Answer
    A. VPRN
    Explanation
    VPRN is a VPN that appears to a customer as a private routed network.

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  • 3. 

    Which of the following term-definition pairs is incorrect?

    • Push-Add a label

    • Swap-Replace a label

    • Label distribution protocol-Series of labels and next-hop interfaces

    • Pop-Remove a label

    Correct Answer
    A. Label distribution protocol-Series of labels and next-hop interfaces
    Explanation
    This description is the Label Switched Path.

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  • 4. 

    Which of the following is not  a type of VPN?

    • VPWS

    • VPNM

    • VPLS

    • VPRN

    Correct Answer
    A. VPNM
    Explanation
    VPNM is not a type of VPN.

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  • 5. 

    A VPN that provides a simple point-to-point service between two destinations is a _____.

    • VPNM

    • VPLS

    • VPWS

    • None of the above

    Correct Answer
    A. VPWS
    Explanation
    VPWS is a VPN that emulates a point-to-point service between two destinations.

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  • 6. 

    As a packet traverses an MPLS network, it passes through a router that removes one label and replaces it with another. The router it passed through was a _____ router.

    • PE

    • CE

    • LER

    • P

    Correct Answer
    A. P
    Explanation
    P routers swap labels and forward them to other P or PE routers.

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  • 7. 

    In an MPLS network, the customer routers have no knowledge of how the MPLS features are implemented. The benefits of this include _____.

    • Ease of CE configuration

    • It allows for very scalable VPN solutions.

    • It lowers CE management overhead.

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    Transparency of the MPLS features to a CE device has all of the benefits listed.

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  • 8. 

    Which of the following is not an accurate description of a VPN?

    • A series of point-to-point tunnels configured on client equipment

    • A tunnel technology created in a provider network

    • A function of MPLS networks to create private communities of users

    • Any network that includes encryption

    Correct Answer
    A. Any network that includes encryption
    Explanation
    Encryption can be a part of a VPN, but the correct description of a VPN should include a way to privatize communications between user communities. The other answers speak to this, but answer D does not.

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  • 9. 

    Which of the following is false regarding LDP?

    • It is used to define unidirectional paths through the network.

    • It is a protocol specifically intended for label distribution.

    • It is the only method for distributing labels in an MPLS network.

    • It describes a path through the MPLS network based on the IGP path.

    Correct Answer
    A. It is the only method for distributing labels in an MPLS network.
    Explanation
    LDP is only one method of distributing labels; RSVP can be used as well as other protocols.

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  • 10. 

    The VPN service that requires encryption is _____.

    • VPRN

    • VPNM

    • VPLS

    • None of the above

    Correct Answer
    A. None of the above
    Explanation
    None of the VPN services provided by an MPLS network require encryption.

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  • 11. 

    The relationship between LDP and an IGP is best described as _____.

    • LDP paths are preferred over IGP routes.

    • LDP uses IGP next-hop information.

    • LDP re-distributes labels into IGP.

    • IGP tags network destinations with LDP information.

    Correct Answer
    A. LDP uses IGP next-hop information.
    Explanation
    LDP and IGPs do not re-distribute information directly or compete with each other for paths as they perform completely different functions, although LDP does use the information from IGP to populate the next-hop interfaces for labels.

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  • 12. 

    The VPN service that must maintain a table of MAC addresses is _____. 

    • VPWS

    • VPLS

    • VPRN

    • Both A and B

    Correct Answer
    A. VPLS
    Explanation
    VPLS is a VPN that must maintain a table of MAC addresses.

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  • 13. 

    A packet arrives at a router with a label, and the router cannot perform any operations on it. The router is most likely a _____.

    • LSR

    • PE

    • LER

    • None of the above

    Correct Answer
    A. None of the above
    Explanation
    PE, LSR, and LER routers can all understand labels. The router is most likely a CE router, which is not one of the choices.

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  • 14. 

    Which of the following is false regarding an SDP? 

    • It provides transport tunnel encapsulation.

    • It is specific to a single service.

    • The SDP ID is locally unique.

    • LDP can be used as the signaling protocol.

    Correct Answer
    A. It is specific to a single service.
    Explanation
    SDPs are not specific to a single service and can support multiple services.

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  • 15. 

    Which of the following accurately describes a P device?

    • It is used exclusively by the customer.

    • It is responsible for adding and removing labels.

    • It swaps label information and forwards packets.

    • It creates an LSP in the provider network.

    Correct Answer
    A. It is responsible for adding and removing labels.
    Explanation
    Answer A is a CE, and answer C is a P. D is partially correct, but B is the more accurate answer.

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  • Current Version
  • Aug 21, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Jul 19, 2017
    Quiz Created by
    Teenoko
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