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4A0-M02 Nokia Mobile Gateways for the LTE Evolved Packet Core Questions and Answers

Questions 4

Which of the following statements is FALSE regarding the SGW?

Options:

A.

A UE may be served by more than one SGW at a given time.

B.

The SGW is connected to the E-UTRAN via the S1-u interface.

C.

The SGW may provide data plane connectivity between two eNodeBs.

D.

The SGW connects to the PGW via the S5/S8 interface.

E.

The SGW acts as a common anchor point during handovers between LTE and Release 8 UMTS networks.

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Questions 5

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

Options:

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.

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Questions 6

Which of the following statements is FALSE regarding the communication between a UE and an eNodeB?

Options:

A.

The eNodeB terminates the air interface of the UE and manages the radio connection between the UE and the eNodeB.

B.

The eNodeB transmits the paging messages to an idle UE when the paging is required.

C.

During an IMSI attach, the UE informs the eNodeB which MME should be used to service it.

D.

The eNodeB performs the compression and encryption of the user data stream.

E.

A UE must go through an eNodeB to access the EPC core.

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Questions 7

Which of the following are Diameter-based interfaces?

Options:

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.

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Questions 8

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

Options:

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

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Questions 9

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

Options:

A.

The default bearer is initiated by either the UE or the PCRF.

B.

The default bearer is always the first bearer established to an APN.

C.

An AF server may initiate a dedicated bearer to a UE.

D.

EPS bearers that connect a given UE to a single PGW may use different IP subnets.

E.

The default bearer remains active throughout the lifetime of the APN connection.

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Questions 10

Based on the information shown in the exhibit, which of the following is the MBR/GBR value for Bearer 6 in the DL direction?

4A0-M02 Question 10

Options:

A.

15000/10000 kbps

B.

30000/20000 kbps

C.

45000/30000 kbps

D.

60000/40000 kbps

E.

None of the above answers are correct.

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Questions 11

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

Options:

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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Questions 12

Based on the information shown in the exhibit, and assuming this is the only bearer present, what is the action taken by the SGW when:

4A0-M02 Question 12

- The SGW receives a GTP packet over its S5 interface, and

- The TEID value in the GTP header is set to 0x802d25?

Options:

A.

The packet is forwarded to the eNodeB

B.

The packet is buffered.

C.

The packet is dropped.

D.

The packet is forwarded to the MME.

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Questions 13

Which of the following interfaces is not using the GTP-C protocol?

Options:

A.

The X2 interface.

B.

The S1-U interface.

C.

The S4 interface.

D.

The S5 interface.

E.

The SGi interface.

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Questions 14

Which of the following statements is TRUE when a registered UE goes idle?

Options:

A.

All UE resources are freed on the MME.

B.

All UE resources are freed on the eNodeB.

C.

All UE resources are freed on the SGW.

D.

The UE triggers the S1 Release procedure

E.

None of the above statements are true.

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Questions 15

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

Options:

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 Nokia 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.

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Questions 16

When a UE is roaming, which of the following interfaces is used when the visiting SGW needs to communicate with the UE's home PGW?

Options:

A.

TheS1 interface.

B.

The S5 interface.

C.

The S8 interface.

D.

The S10 interface.

E.

The SGi interface.

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Questions 17

On the Nokia 7750 PGW, which of the following CLI commands Is used to check the APN-AMBR enforced on the PGW for a particular UE?

Options:

A.

Show mobile-gateway pdn pdn-context

B.

Show mobile-gateway pdn pdn-context imsi detail

C.

Show mobile-gateway pdn bearer-context

D.

Show mobile-gateway pdn bearer-context imsi detail

E.

Show mobile-gateway pdn ue-context

F.

Show mobile-gateway pdn ue-context imsi detail

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Questions 18

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 "Private2"? Assume everything else is in working condition.

4A0-M02 Question 18

Options:

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 "any".

D.

The "Create Session Request" cannot have an "APN Restriction" value of "Private2.

E.

None of the above answers are correct.

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Questions 19

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

Options:

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.

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Questions 20

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?

Options:

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

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Questions 21

Which of the following statements is TRUE regarding the IP connectivity between a UE and a PDN?

Options:

A.

A UE gets an IPv4 address and/or an IPv6 prefix per APN.

B.

A PGW forwards the UE's IP packets to the PDN based on the address of the PDN server.

C.

When a UE sends an IP packet to a PDN over the EPC core, the eNodeB forwards the encapsulated packet to the SGW by looking into its IP routing table to determine how to reach the PDN server.

D.

The SGW forwards the UE's IP packets to the PGW based on the address of the PDN server.

E.

Only answers C and D are correct.

F.

Only answers A and B are correct.

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Exam Code: 4A0-M02
Exam Name: Nokia Mobile Gateways for the LTE Evolved Packet Core
Last Update: Dec 11, 2023
Questions: 140