ETCP Core Network Architecture

Question 1

In Ericsson's 5G core (5GC), what function handles session management for user data bearers?

Accepted Answer

SMF

Answer

The SMF (Session Management Function) establishes, modifies, and releases PDU sessions and assigns IP addresses to UEs in the 5G core.

Question 2

Which 5G core network function is responsible for authenticating subscribers and managing mobility?

Accepted Answer

AMF

Answer

The AMF (Access and Mobility Management Function) handles UE registration, authentication coordination, and mobility management in the 5GC.

Question 3

In Ericsson's EPC (4G core), what does the PGW do?

Accepted Answer

Acts as the gateway between the LTE core and external data networks (internet)

Answer

The PDN Gateway (PGW) serves as the anchor point between the EPC and external packet data networks, performing IP address allocation and policy enforcement.

Question 4

What is the role of the NRF (Network Repository Function) in Ericsson's 5G core?

Accepted Answer

Maintaining a registry of available NFs and enabling service discovery

Answer

The NRF acts as a service registry where 5GC network functions register their profiles and discover other NFs they need to communicate with.

Question 5

In Ericsson's IMS (IP Multimedia Subsystem), what is the function of the P-CSCF?

Accepted Answer

Provides the first SIP contact point for UEs registering to IMS

Answer

The P-CSCF (Proxy Call Session Control Function) is the entry point into the IMS for UEs, forwarding SIP messages to the serving CSCF.

ETCP - Ericsson Technical Certification Program Practice Test

ETCP - Ericsson Technical Certification Program Practice Test

ETCP Core Network Architecture