4A0-M10 Online Practice Questions and Answers

Which of the following statements regarding cloud RAN architecture is FALSE?

A. The gNB is split into three functional modules: a radio unit (RU), a distributed unit (DU), and a centralized unit (CU).

B. DU performs the non-real time processing of layer 2.

C. The fronthaul segment connects RU to DU and the midhaul segment connects DU to CU.

D. CU can be deployed in the cloud as a VNF.

A UE has a PDU session established using slice 1. The operator removes slice 1 from the UE subscription data stored in UDM. Which of the following actions is NOT performed as a result?

A. UDM notifies the serving AMF about the UE subscription data modification.

B. AMF initiates the UE configuration update procedure.

C. AMF requests the UE to release the established PDU session.

D. UE updates its slicing information with the data received from AMF.

Which of the following does NOT apply to an idle UE in MICO mode?

A. The UE performs registration updates.

B. The UE connects to the network to send uplink data.

C. Power and signaling efficiency is optimized for the UE.

D. The UE listens and responds to paging.

Which of the following statements regarding the 5G security components is FALSE?

A. The authentication credential repository and processing function (ARPF) selects the authentication method to use for the UE.

B. The authentication server function (AUSF) handles authentication requests for both 3GPP and non3GPP access.

C. The security anchor function (SEAF) makes the final decision on UE authentication.

D. The security identifier de-concealing function (SIDF) decrypts the UE's SUCI to obtain its corresponding SUPI.

The exhibit below illustrates signaling messages exchanged during a 5GS to EPS Handover procedure using N26. Which information is NOT provided to AMF in step 6 for a PDU session that supports interworking?

A. PGW-U indirect data forwarding tunnel info for the corresponding PDN connection

B. PGW-C S5-C tunnel info for the corresponding PDN connection

C. PGW-U S5-U tunnel info for each EPS bearer

D. EPS bearer ID and QoS parameters for each EPS bearer

Which of the following elements is NOT used in the 5G non-standalone (NSA) deployment Option 3?

A. Evolved Packet Core

B. ng-eNB

C. gNB

D. Dual Radio UE

Which of the following best describes the Secondary Node Addition procedure?

A. Used to transfer bearer contexts from the master eNB to the secondary gNB.

B. Used to establish a UE context at the gNB for a UE that supports option 3X.

C. Used to establish connectivity from the gNB to the EPC.

D. Used to establish an X2 connection between the eNB and gNB.

An AMF needs to know when an SMF deregisters with the NRF. Which of the following NRF APIs should the AMF use?

A. Nnrf_NFManagement_NFUpdate Request

B. Nnrf_NFDiscovery_NFDiscover Request

C. Nnrf_NFManagement_NFStatusSubscribe Request

D. Nnrf_NFManagement_NFDeregister Request

Which of the following statements about the downlink user plane data flow in Option 3X is FALSE?

A. Data packets of bearers that do not use dual connectivity are sent from EPC to UE through eNB.

B. When NR coverage is good, data packets of bearers that use dual connectivity are sent from EPC to UE using secondary cell group bearers.

C. When NR coverage degrades, the gNB decides when to use split bearers and send some of the packets received from the core through eNB.

D. When NR coverage is poor, data packets of bearers that use dual connectivity are sent to the UE through eNB.

Which of the following statements about 5GS PDU sessions is FALSE?

A. A PDU session allows for the exchange of PDUs between UE and a data network.

B. A PDU session contains one single dedicated radio bearer and one or more N3 GTP-U tunnels.

C. A PDU session has one default QoS flow and can have multiple non-default QoS flows.

D. A PDU session has one or more UPFs acting as PDU session anchors.