4A0-M02 Online Practice Questions and Answers
Which of the following statements most accurately describes the MME?
A. The MME selects the SGW and the PGW for a given UE.
B. The MME is responsible for the bearer management.
C. The MME communicates with both the E-UTRAN and the EPC via GTP-C tunnels.
D. The MME performs the user authentication and authorization using the information provided by the HSS
E. All of the above answers are correct.
F. Only answers A, B and D are correct.
Which of the following statements is FALSE regarding the Tracking Area (TA)?
A. A TA is a set of eNodeBs that are defined by a UE itself.
B. A TA is the smallest geographical area in which a UE can roam without performing a Tracking Area Update (TAU) other than periodic TAU as required.
C. A Tracking Area Identity (TAI) is used to identify each tracking area.
D. The Tracking Area Identity (TAI) is assigned by the service provider.
E. One TA may be served by one or more than one MME.
How many S11 GTP-C tunnels are established for a UE having:
-
One default bearer to APN1, and
-
One dedicated bearer to APN1, and
-
One default bearer to APN2, and
-
Two dedicated bearers to APN2?
A.
One
B.
Two
C.
Three
D.
Four
E.
Five
Based on the information shown in the exhibit, which of the following is the time interval used by the SGW to retransmit a GTP signaling message?
A. 3 seconds
B. 5 seconds
C. 6 seconds
D. 60 seconds
E. 90 seconds
On Alcatel-Lucent 7750 PGW, which of the following CLI commands can be used to check the TEID-C values assigned to an S5 GTP-C tunnel for a particular UE?
A. Show mobile-gateway pdn pdn-context
B. Show mobile-gateway pdn pdn-context imsi
C. Show mobile-gateway pdn ue-context
D. Show mobile-gateway pdn ue-context imsi
E. Show mobile-gateway pdn bearer-context
F. Show mobile-gateway pdn bearer-context imsi
Which of the following statements are FALSE regarding the SDF templates / filters? (Choose two)
A. One dedicated bearer can have more than one SDF template.
B. One SDF template can have only one SDF filter for each direction.
C. One dedicated bearer can have more than one SDF template and multiple SDF filters.
D. One dedicated bearer can have only one SDF template.
E. One SDF template can have multiple SDF filters for each direction.
Which of the following statements is TRUE when a UE is in the EMM_DEREGISTERED/ECM_IDLE state?
A. There is no radio bearer between the UE and the eNodeB. The S1-MME, S1-U, and S5 connections are all released for the UE.
B. There is no radio bearer between the UE and the eNodeB. The S1-MME connection is released but the S1-U and S5 connections are still available for the UE.
C. There is no radio bearer between the UE and the eNodeB. The S1-MME and the S1-U connections are released but the S5 connection is still available for the UE.
D. There is no radio bearer between the UE and the eNodeB. The S1-MME, S1-U and S5 connections are still available for the UE.
E. None of the above answers are correct.
Which of the following statements is FALSE regarding the UE attachment procedure?
A. As a result of this procedure, a default bearer must be established
B. As a result of this procedure, a dedicated bearer must be established
C. As a result of this procedure, the UE is registered with the network
D. As a result of this procedure, the UE is authenticated by the network
E. As a result of this procedure, the UE has an IP connectivity to an APN
A UE is exchanging best-effort (BE) IP traffic with a PDN server over an EPS bearer with a QCI/ARP value of 9/12. Based on the information shown in the exhibit, what is the DSCP value of traffic egressing the S5 interface of the PGW to the SGW?
A. BE
B. EF
C. AF21
D. NC
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.