Alcatel-Lucent Mobile Gateways for the LTE Evolved Packet Core v7.0 (4A0-M02)

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Total 146 questions

Which of the following LTE interfaces are used for the communication of control messages? (Choose one best answer)

  • A. The S1-MME interface and the S11 interface.
  • B. The S5 interface.
  • C. The Gx interface.
  • D. The LTE-Uu interface and the Rx interface.
  • E. All of the above answers are correct.
  • F. Only answers A, B and C are correct.


Answer : E

The S1-MME is the interface used for the communication between the eNodeB and the
MME. Which of the following transport protocols is used by this interface?

  • A. The Transmission Control Protocol (TCP)
  • B. The User Datagram Protocol (UDP)
  • C. The TCP or the UDP
  • D. The Stream Control Transmission Protocol (SCTP)
  • E. None of the above answers are correct


Answer : D

Based on the information shown in the exhibit, how many mobile subscribers is the PGW currently serving?

  • A. 1
  • B. 2
  • C. 3
  • D. 5
  • E. 6
  • F. Unable to determine based on the provided information.


Answer : C

Based on the information shown in the exhibit, when the SGW sends an uplink user IP packet to the PGW, which of the following is the GTP TEID value expected in the GTP packet header?

  • A. 0xd05425
  • B. 0x4f00805
  • C. 0x21
  • D. 0x4f00825
  • E. None of the above answers are correct


Answer : A

Which of the following is used to carry the GTP Path Management message "Echo
Request"?

  • A. TheGTPv1 protocol.
  • B. The GTPv2 protocol.
  • C. The TCP protocol.
  • D. TheGTPv1 protocol or the GTPv2 protocol.
  • E. None of the above answers are correct.


Answer : D

Which of the following are Diameter-based interfaces?

  • A. The RF and the S10 interfaces.
  • B. The RF and the Gx interfaces.
  • C. The Rx and the S4 interfaces.
  • D. The Rx and the SGi interfaces.
  • E. The S9 and the S11 interfaces.


Answer : B

Which of the following statements is FALSE regarding the X2 interface?

  • A. It is the interface used to connect two eNodeBs.
  • B. It provides some mobility management functions between two eNodeBs.
  • C. The X2-AP is the application layer signaling protocol for the X2 interface.
  • D. It is never used to transport user data packets.
  • E. It is an IP-based interface.


Answer : D

Which of the following statements is TRUE when the Alcatel-Lucent 7750 MG receives a
GTP packet that has a valid TEID?

  • A. The ingress IOM forwards the packet directly to the MG-ISM module for further processing.
  • B. The ingress IOM drops the packet.
  • C. The ingress IOM forwards the packet to the CPM for further processing.
  • D. The Alcatel-Lucent 7750 MG forwards the packet to its IP destination by looking into the local IP routing table.
  • E. None of the above answers are correct.


Answer : A

Based on the information shown in the exhibit, which of the following is the time interval used by the SGW to retransmit a GTP signaling message?

  • A. 3 seconds
  • B. 5 seconds
  • C. 6 seconds
  • D. 60 seconds
  • E. 90 seconds


Answer : B

A PGW may use various methods to assign an IP address to a UE. Which of the following methods is supported on Alcatel-Lucent 7750 PGW? (Choose the best answer)

  • A. local-pool
  • B. hss-static
  • C. Radius / Diameter server.
  • D. PCRF server
  • E. All of the above answers are correct
  • F. Only answers A, B and C are correct


Answer : F

Based on the information shown in the exhibit, which of the following is TRUE when the
PGW receives a "Create Session Request" with the "APN Restriction" set to "Private1"?
Assume everything else is in working condition.

  • A. The "Create Session Request" is rejected by the PGW and no bearer is created.
  • B. The "Create Session Request" is accepted by the PGW and the bearer is created successfully.
  • C. The APN cannot be configured with an "APN Restriction" value of "Private1".
  • D. The "Create Session Request" cannot have an "APN Restriction" value of "Private1".
  • E. None of the above answers are correct.


Answer : A

Which of the following messages are exchanged between the PGW and the PCRF during the UE attachment procedure?

  • A. Authorization Control Request/ Authorization Control Answer
  • B. Credit Control Request / Credit Control Answer
  • C. Create Session Request/ Create Session Answer
  • D. Attach Request/Attach Answer


Answer : B

After a UE attachment procedure, which GTP-U tunnels are established for the UE?

  • A. S1-MME GTP-U tunnel and S5 GTP-U tunnel.
  • B. S1-U GTP-U tunnel and S5 GTP-U tunnel.
  • C. S1-U GTP-U tunnel. S5 GTP-U tunnel, and Gx GTP-U tunnel.
  • D. S1-U GTP-U tunnel and Gx GTP-U tunnel.
  • E. No GTP-U tunnels are established.


Answer : B

Which of the following resources are freed when a registered UE goes idle? (Choose 2)

  • A. S1-MME signaling connection
  • B. S11GTP-C tunnel
  • C. S1 GTP-U tunnel
  • D. S5 GTP-C tunnel
  • E. S5 GTP-U tunnel


Answer : A,C

During a service request procedure, which message is sent by the MME over the S11 interface to provide the SGW with the eNodeB address and eNodeB S1-U TEID?

  • A. Downlink Data Notification
  • B. Downlink Data Notification Ack
  • C. Modify Bearer Request
  • D. Modify Bearer Response


Answer : C

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Total 146 questions