4A0-M02 Real Exam Questions and Verified Answers

Question 1 Single choice

Which of the following most accurately describes the messages used to manage a Diameter connection path?

A
The Capabilities-Exchange message
B
The Device-Watchdog message
C
The Credit-Control message
D
The Disconnect-Peer message
E
All of the above answers are correct
F
Only answers A, B and D are correct

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Correct answer: F

Question 2 Multiple choice

During the establishment of a default bearer, which of the following statements are TRUE regarding the TEID-U assigned by the eNodeB to the S1-U tunnel? (Choose two)

A
The eNodeB includes this TEID-U value in the Create Session Request message sent to the SGW over the S1 interface.
B
The eNodeB includes this TEID-U value in the Attach Request message sent to the MME over the S1-
MME interface.
C
The MME includes this TEID-U value in the Create Session Request message sent to the SGW over the S11 interface.
D
The MME includes this TEID-U value in the Modify Bearer Request message sent to the SGW over the
S11 interface.
E
The eNodeB includes this TEID-U value in the Attach Complete message sent to the MME over the S1-
MME interface.
F
The eNodeB includes this TEID-U value in the Modify Bearer Request message sent to the SGW over the S1 interface.

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Correct answers: D, E

Question 3 Single choice

A HE (HTTP client) is communicating with an HTTP server over The EPC core Based on the information shown in the exhibit, what is the maximum HTTP traffic rate that the UE may have in the DL direction?

A
10000 kbps
B
15000 kbps
C
20000 kbps
D
30000 kbps
E
55000 kbps
F
None of the above answers are correct.

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Correct answer: E

Question 4 Multiple choice

Which of the following statements are FALSE regarding the SGW? (Choose two)

A
The SGW is connected to the E-UTRAN via the S1-u interface.
B
At a given time, a single SGW handles all the connections for a given UE.
C
The SGW provides downlink data buffering and paging for an idle UE.
D
The SGW can connect to only one PGW.
E
The SGW acts as a common anchor point during handovers between LTE and Release 8 UMTS networks.
F
The SGW may provide data plane connectivity between two eNodeBs.

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Correct answers: C, D

Question 5 Single choice

An Alcatel-Lucent SGW is only connected to an Alcatel-Lucent PGW.
Based on the information shown in the exhibit, how many GTP-C tunnels are established between the SGW and the PGW?

A
1
B
2
C
3
D
4
E
6

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Correct answer: E

Question 6 Single choice

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.

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Correct answer: A

Question 7 Single choice

Which of the following statements is FALSE regarding the S1-U interface?

A
It is the user plane interface used to connect the E-UTRAN and the EPC core.
B
It relies on the GTP-C path to exchange the "Echo Request" / "Echo Response" messages between the eNodeB and the SGW.
C
It may be used to transport user data during the inter-eNodeB handover.
D
It uses the GTP-U protocol.
E
The UDP protocol is used as the transport protocol.

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Correct answer: B

Question 8 Single choice

Which of the following statements is FALSE regarding the SGW handling of an incoming GTP packet with a TEID value of zero?

A
The ingress IOM card forwards the received packet to the active CPM card.
B
After processing the received packet, the MG-ISM card creates a response and sends it to the active
CPM card
C
The CPM card forwards the packet to an active MG-ISM card.
D
The MG-ISM card creates the proper contexts and assigns the required TED values.
E
None of the above statements are false.

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Correct answer: B

Question 9 Single choice

Which of the following most accurately describes the CPM modules on an Alcatel-Lucent 7750 MG?

A
The CPM modules are responsible for load balancing the EPS bearers.
B
The CPM modules always choose the same MG-ISM group to handle all the bearers of a given UE.
C
Two CPM modules can be installed on an Alcatel-Lucent 7750 MG node. One CPM is in active state while the other is in hot-standby state.
D
The CPM module also includes the Switch Fabric function for the Alcatel-Lucent 7750 MG.
E
All of the above answers are correct.

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Correct answer: E

Question 10 Single choice

On Alcatel-Lucent 7750 PGW, which of the following CLI commands is used to verify the EPS procedures being performed on the mobile gateway?

A
Show mobile-gateway pdn call-flow-statistics
B
Show mobile gateway pdn call-flows
C
Show mobile-gateway pdn call-flow-stats
D
Show mobile-gateway pdn 1 call-flow-statistics

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Correct answer: C