Question: What is the maximum number of APN-level Overload Control Information (OCI) instances that can be included in a single GTP-C message?
Option 1: 5
Option 2: 10
Option 3: 20
Option 4: No limit
Explanation: According to the specification, at message level, there shall be at most one instance of node-level Overload Control Information IE per node and at most 10 APN-level instances. This ensures that the processing of the message on the receiver side and the size of the message are limited.