A.Logs are generated based on log events.

B.Log files can be retrieved under the "/data-logs" folder.

C.Different log files are generated automatically in the system.

D.Details about each log can be displayed using the verbose (-v) flag.

A.eNodeB selects an MME according to weight factors received from the MMEs in its serving pool.

B.eNodeB selects an MME with the lowest order value in the DNS NAPTR record.

C.MME is configured to offload some registered UEs to another MME in a different MME pool area.

D.Affected UEs are signaled to release their S1 and RRC connections.

A.Perform network element selection

B.Support dedicated bearer creation, modification, and deletion

C.Support default bearer creation, modification, and deletion

D.Inform other network elements about subscription data changes in HSS

A.A tracking area can belong to one or more SGW service areas.

B.An SGW service area is served by one or more SGW pools.

C.A UE can move within an SGW service area without changing the serving SGW.

D.An SGW can be a member of one or more SGW pools.

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

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

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

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