Question: In a Policy and Charging Control (PCC) architecture, what is a characteristic of Emergency APNs stored in the Policy and Charging Rules Function (PCRF)?
Option 1: They always require a statically assigned IP address for User Equipment (UE).
Option 2: They may not include an International Mobile Subscriber Identity (IMSI) in PCC/QoS Rule requests.
Option 3: They are exclusively used for Voice over LTE (VoLTE) emergency services.
Option 4: They necessitate a dedicated bearer for all types of emergency communications.
Explanation: This is correct because, according to the specifications, for Emergency APNs, the IMSI may not be present, and the PCEF, BBERF, and PCRF are required to support requests for PCC/QoS Rules without an IMSI. This highlights the flexibility needed in handling emergency communications, where traditional identification methods might not always be applicable or available.