4A0-M02

Review 137 4A0-M02 practice questions with answer explanations and community insights.

Question 1

Which of the following statements is FALSE regarding the eNodeB?

  1. The eNodeBs maybe interconnect TEID with each other via anX2 interface.
  2. The eNodeB is an element of the EPC core.
  3. The eNodeBs are connected to the EPC core via the S1 interface.
  4. During an IMSI attach, the eNodeB selects an MME to service the UE.
  5. The eNodeB performs the compression and encryption of the user data stream.

Question 2

In a 3G network, which of the following is used to build a PDP context between a UE and the GGSN when a direct tunnel is not used?

  1. An end-to-end GTP tunnel between the UE and the GGSN.
  2. A Radio Access Bearer between the UE and the NodeB and a GTP tunnel between the NodeB and the GGSN.
  3. A Radio Access Bearer between the UE and the SGSN and a GTP tunnel between the SGSN and the GGSN.
  4. A Radio Access Bearer between the UE and the SGSN.
  5. None of the above answers are correct.

Question 3

Which of the following statements is FALSE regarding the EPS bearers?

  1. The default bearer is initiated by either the UE or the PCRF.
  2. The default bearer is always the first bearer established to an APN.
  3. An AF server may initiate a dedicated bearer to a UE.
  4. EPS bearers that connect a given UE to a single PGW may use different IP subnets.
  5. The default bearer remains active throughout the lifetime of the APN connection.

Question 4

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

  1. The S1-MME interface and the S11 interface.
  2. The S1-U interface.
  3. The S5 interface.
  4. The S1-U interface, the S5 interface and the LTE-Uu interface.
  5. Only answers A, B and C are correct.
  6. Only answers B and C are correct.

Question 5

The S5 is the interface used for the communication between the SGW and the PGW. Which of the following transport protocols is used by this interface?

  1. GTP/TCP
  2. GTP/UDP
  3. GTP/IP
  4. GTP/SCTP
  5. None of the above answers are correct
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