Nokia Nokia Certifications 4A0-M03 Questions & Answers

• Question 1:

  If the selected SGW fails, which SGW/PGW will MME select if `gateway selection mode 2' is used?

  A. A new SGW, but new PGW selection is not required

  B. A new SGW first, then select a new PGW that is topologically closest to the newly selected SGW

  C. A new SGW first, then select a new PGW with the best order and preference values

  D. The next topologically closest SGW/PGW pair

  Correct Answer: A

• Question 2:

  The DNS NAPTR records shown in the exhibit are returned to the MME during SGW/PGW selection.

  If gateway selection mode 1 is used, which SGW/PGW pair is selected by the MME?

  

  A. sgw01 and pgw01

  B. sgw01 and pgw02

  C. sgw02 and pgw01

  D. sgw02 and pgw02

  Correct Answer: B

• Question 3:

  What information does eNodeB use to ensure MME load balancing during MME selection?

  A. MME relative capacity value received from each MME in the pool

  B. MME capacity value received from the UE attach request message

  C. MME capacity value from the UE's subscription data received from the HSS

  D. MME relative capacity value calculated by each MME based on the current network load

  Correct Answer: A

• Question 4:

  Which of the following statements regarding SGW selection by the MME is FALSE?

  A. SGW selection can occur during initial attach, tracking area update, or handover procedures

  B. MME can select an SGW by performing a DNS query on a given TAI FQDN

  C. MME can select an SGW based on the overload control information received from each SGW in the SGW pool

  D. MME can select an SGW from the SGW pool(s) configured to serve the given TAI

  Correct Answer: C

• Question 5:

  Which of the following statements regarding handover is FALSE?

  A. Handover can occur when UE is in ECM-CONNECTED state

  B. S1-based handover is used when X2-based handover attempt failed

  C. During X2-based handover, MME may remain the same or be relocated

  D. S1-based handover is used when there is no X2 interface between source and target eNodeBs

  Correct Answer: C

• Question 6:

  Which of the following statements best describes a home PLMN?

  A. A network where a UE is currently registered and has a different PLMN ID from the UE's PLMN ID

  B. A provisioned network that is shared by multiple operators

  C. A network where a UE is currently being served

  D. A network where a UE is subscribed

  Correct Answer: C

• Question 7:

  Which of the following statements regarding paging policy is FALSE?

  A. Paging method defines which forwarding path is used to forward the paging message to eNodeBs

  B. Paging policy defines paging procedures used by MME to page an idle UE

  C. Paging timer specifies the time to wait for a response to a paging request message

  D. Paging attempt specifies the number of times MME tries to page a UE before the UE is deemed non-responsive

  Correct Answer: A

• Question 8:

  Which logical interface is used to transfer UE information from one MME to another MME during relocation?

  A. S10

  B. S3

  C. S6a

  D. S13

  Correct Answer: A

  Reference: https://www.cablefree.net/wirelesstechnology/4glte/lte-interfaces/

• Question 9:

  What network component(s) is/are shared in the gateway core network (GWCN) sharing architecture model?

  A. Only E-UTRAN is shared

  B. Only MME is shared

  C. E-UTRAN and MME are shared

  D. MME and PGW are shared

  Correct Answer: B

• Question 10:

  Given the exhibit, which type of message is sent from the MME to the lawful enforcement monitoring facility (LEMF) for lawful interception support?

  

  A. Intercept request message

  B. Location request message

  C. Content of communication (CC) message

  D. Intercept related information (IRI) message

  Correct Answer: C