What three functions can be performed by a Cisco PGW? (Choose three.)

Question

Options

• AMME Selection for Handovers with MME Change
• BUE IP Address Allocation
• CPolicy Enforcement
• DDeep Packet Inspection
• ETracking Area List Management
• FNon Access Stratum Signaling

• A
  12% (6)
• B
  80% (40)
• E
  6% (3)
• F
  2% (1)

Explanation

A Cisco PGW (Packet Data Network Gateway) is the anchor point between the LTE Evolved Packet Core and external data networks. It handles UE IP Address Allocation (B) by assigning IP addresses to devices when they establish a PDN connection, performs Policy Enforcement (C) by acting as the Policy and Charging Enforcement Function (PCEF) to apply QoS and charging rules from the PCRF, and conducts Deep Packet Inspection (D) to classify and manage traffic flows for policy decisions and lawful intercept.

The distractors describe functions belonging to other EPC nodes: A (MME Selection for Handovers with MME Change) and E (Tracking Area List Management) are both MME responsibilities - the MME manages mobility, tracking areas, and selects a new MME during handovers. F (Non Access Stratum Signaling) is also an MME function, as NAS messages flow directly between the UE and MME, not through the PGW.

Memory tip: Think of the PGW as the "internet doorman" - it hands you an IP address at the door (B), checks your policy credentials before letting traffic through (C), and inspects your packets to enforce the rules (D). Everything about mobility and signaling belongs to the MME, not the PGW.

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