Which functionality in SGSN is in charge of the activation, modification, and deactivation of a GPRS session?

Question

Options

• AGPRS mobility management
• BSession management
• CGPRS Tunneling Protocol
• DCisco Security services

• A
  6% (2)
• B
  88% (29)
• C
  3% (1)
• D
  3% (1)

Explanation

Session Management (SM) is the SGSN subsystem responsible for the full lifecycle of a GPRS session - activating a PDP context when a device requests data access, modifying it (e.g., changing QoS parameters), and deactivating it when the session ends.

Why the distractors are wrong:

• A (GPRS Mobility Management): GMM handles registration, authentication, and tracking of mobile subscribers across cells - it manages who is connected, not how data sessions are set up.
• C (GPRS Tunneling Protocol): GTP is a transport protocol used to tunnel user data and signaling between GPRS core nodes (SGSN ↔ GGSN) - it's the pipe, not the manager of session state.
• D (Cisco Security Services): This is a vendor-specific product with no role in 3GPP GPRS architecture - a classic distractor designed to catch guessers.

Memory tip: Think of SM as the "session switchboard" - it starts, changes, and stops your data call. GMM = mobility (movement), SM = session (data), GTP = tunnel (transport). The word "Management" in the question aligns directly with "Session Management."

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