4A0-M02 Online Practice Questions and Answers

A UE needs to get an IP address before it can communicate to any PDN over the LTE network. Which of the following statements are FALSE regarding the process of the IP address allocation? (Choose two)

A. A PGW may obtain an IP address from a RADIUS server and assign it to the UE.

B. A PGW may assign the IP address from its local address pools.

C. An SGW may obtain a static IP address from the HSS server and assign it to the UE.

D. An SGW may obtain an IP address from a RADIUS server and assign it to the UE.

E. A PGW may obtain an IP address from a DHCP server and assign it to the UE.

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

A. The S1-MME interface and the S11 interface.

B. The S1-U interface.

C. The S5 interface.

D. The S1-U interface, the S5 interface and the LTE-Uu interface.

E. Only answers A, B and C are correct.

F. Only answers B and C are correct.

Which of the following messages are exchanged between the MME and the SGW during the UE attachment procedure? (Choose two)

A. Create Session Request / Create Session Response

B. Credit Control Request / Credit Control Answer

C. Attach Request/Attach Accept

D. Update Bearer Request / Update Bearer Response

E. Modify Bearer Request / Modify Bearer Response

Which entity decides when a handover procedure needs to be performed?

A. The UE.

B. The source eNodeB.

C. The target eNodeB.

D. The MME.

E. The SGW.

Assume that dynamic PCC rules are used on the PGW. When the UE sends a request to establish a dedicated bearer, which of the following messages are exchanged between the PCRF and the PCEF?

A. The RAR/RAA messages.

B. The CSR/CSResp messages.

C. The CCR/CCA messages.

D. The CSR/CSResp and the CCR/CCA messages.

E. The CSR/CSResp and the RAR/RAA messages

Based on the information shown in the exhibit, which of the following statements is FALSE?

A. Gx commands are not being exchanged with the PCRF peer.

B. EPS bearers can be successfully established to this PGW.

C. The TCP connection to the PCRF peer is not established.

D. Watchdog messages are not being exchanged with the PCRF peer.

E. None of the above statements are false.

On the Alcatel-Lucent 7750 SGW, which of the following is the CLI command to check the "UP / IDLE" state for the GTP path to a PGW?

A. Show mobile-gateway serving ref-point-peers s5

B. Show mobile-gateway serving ref-point-stats s5

C. Show mobile-gateway serving ref-point-peers s1u

D. Show mobile-gateway serving path-mgmt s5

E. None of the above answers are correct.

Which of the following statements are TRUE regarding the Dynamic PCC rules? (Choose two)

A. The Dynamic PCC rules are created on the PCRF and pushed (or pulled) down to the PCEF.

B. The Dynamic PCC rules are created on the PCEF and pushed (or pulled) down to the PCRF.

C. When GTP tunnels are used between the SGW and PGW, the Gxc interface is used between the PCRF and the PCEF to carry the dynamic PCC rules.

D. When GTP tunnels are used between the SGW and PGW, the Rx interface is used between the PCRF and the PCEF to carry the dynamic PCC rules.

E. When GTP tunnels are used between the SGW and PGW, the Gx interface is used between the PCRF and the PCEF to carry the dynamic PCC rules.

Based on the information shown in the exhibit, when the SGW sends a "Create Session Request" message to the PGW, which of the following is the source IP address expected in the IP packet?

A. 10.10.2.1

B. 10.10.7.1

C. 20.20.0.1

D. 72.22.24.163

E. None of the above answers are correct

A UE needs to get an IP address before it can communicate to any PDN over the LTE network. Which of the following statements most accurately describes the process of the IP address allocation?

A. A UE may obtain an IP address during the PDN connection setup.

B. A PGW may assign the IP address from its local address pools.

C. A PGW may obtain an IP address from a RADIUS server and assign it to the UE.

D. A PGW may obtain an IP address from a DHCP server and assign it to the UE.

E. All of the above answers are correct.