Question: What is the primary purpose of the LCS-Requestor-ID-String AVP (AVP code 1240) in Diameter charging applications?
Option 1: To indicate if a local gateway is inserted for media components.
Option 2: To specify the type of charging protocol used (e.g., offline, online).
Option 3: To identify the requestor of a Location Service (LCS), which can be represented by an MSISDN or a logical name.
Option 4: To define the encoding scheme for AVP values in Diameter messages.
Explanation: The LCS-Requestor-ID-String AVP is specifically designed to hold the identification of the entity requesting location services, crucial for billing, authentication, and authorization in telecom networks, especially with Location-Based Services (LBS), identifying the requestor via MSISDN or logical name.