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4A0-103 Real Exam Questions

Nokia Multiprotocol Label Switching

249 questions available · Page 1 of 25

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Question 1 Single choice

Which of the following statements regarding the MPLS SWAP label operation is true?

  1. A

    The inner label will be exchanged with the MPLS outer label.

  2. B

    The inner label will be exchanged for a new label.

  3. C

    The outer label will be exchanged for a new label.

  4. D

    All labels will be exchanged for one new label.

  5. E

    All labels will be exchanged for an equal number of new labels.

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Correct answer: C

Question 2 Single choice

Which of the following regarding MPLS Encapsulation is FALSE?

  1. A

    The customer's Layer 2 header is preserved at the iLER for Layer 2 services.

  2. B

    The customer's Layer 2 Header is preserved at the iLER for Layer 3 services.

  3. C

    The service provider's Layer 2 header is added at the iLER for Layer 2 services.

  4. D

    The service provider's Layer 2 header is added at the iLER for Layer 3 services.

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Correct answer: B

Question 3 Multiple choice

Which of the following are features of RSVP-TE? Choose three answers.

  1. A

    It supports IGP-based LSPs.

  2. B

    It supports constrained path LSPs.

  3. C

    It does not support loose explicit path LSPs.

  4. D

    It is recommended for use in Traffic Engineering applications.

  5. E

    It cannot be used with facility backup fast reroute.

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Correct answers: A, B, D

Question 4 Multiple choice

Click on the exhibit button below.

Given the output below, which of the following statements are true? (Choose three)

  1. A

    A packet arriving with label 131066 and destined for prefix 10.10.10.243/32 will be forwarded out
    interface 1/1/4, with label 131070.

  2. B

    LDP ECMP is enabled.

  3. C

    The router's system address is 10.10.10.242/32.

  4. D

    There are multiple LSPs to reach FEC 10.10.10.244/32.

  5. E

    The router cannot receive any unlabeled packets destined for prefix 10.10.10 223/32.

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Correct answers: A, B, D

Question 5 Multiple choice

Which of the following statements regarding per-platform label space are true? Choose two answers.

  1. A

    A separate label is used for each interface that the FEC is advertised on.

  2. B

    It uses fewer label resources than a per-interface label space.

  3. C

    It is typically used when the device has ATM or Frame Relay interfaces.

  4. D

    It uses more label resources than a per-interface label space.

  5. E

    A single label may be assigned to an FEC and used across all interfaces of the same router.

  6. F

    It is only valid when the LDP peers are directly connected over an interface, and the label is only going to be used for traffic sent over that interface.

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Correct answers: B, E

Question 6 Multiple choice

If the destination IP address of a received unlabeled packet is successfully matched in the FIB, which of the following statements are true? Choose two answers.

  1. A

    A PUSH label stack operation must be performed.

  2. B

    The outgoing interface and next-hop address will be determined from the FIB.

  3. C

    The packet can be forwarded as a labeled or unlabeled packet.

  4. D

    A POP label stack operation may be performed.

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Correct answers: B, C

Question 7 Single choice

Click on the exhibit button.

The policy on router R2 is applied as an LDP export policy.

What FECs now appear in router R2's LIB?

  1. A

    Local FECs, not including those in the 192.168.1.0/24 address space.

  2. B

    Only system ID FECs may appear in the LIB.

  3. C

    Any local FECs, except those with a 24 bit mask.

  4. D

    Local FECs in the 192.168.1.0/24 address space

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Correct answer: A

Question 8 Single choice

Click on the exhibit.

All links are operationally up initially.

When the link between routers R4 and R6 goes down, what will router R1 do?

  1. A

    Router R1 will switch traffic to the secondary path immediately.

  2. B

    Router R1 will discard traffic until a new IGP route to router R6 is re-calculated.

  3. C

    Router R1 will discard traffic because the secondary path is not a fully strict path.

  4. D

    Router R1 will signal the secondary path and switch traffic to it.

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Correct answer: D

Question 9 Single choice

Which mode does the following statement describe? An LSR will advertise a label mapping immediately, without waiting for a label mapping from the FEC's next-hop.

  1. A

    Liberal label retention mode

  2. B

    Conservative label retention mode

  3. C

    Ordered control mode

  4. D

    Independent control mode

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Correct answer: D

Question 10 Single choice

Which of the following regarding MPLS encapsulation for VPRN services is TRUE?

  1. A

    The customer's Layer 3 header is removed at the iLER.

  2. B

    The customer's Layer 2 header is removed at the iLER.

  3. C

    The customer's Layer 3 header is removed at the eLER.

  4. D

    The customer's Layer 2 header is removed at the eLER.

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Correct answer: A