Question: What is the purpose of the ATTACH COMPLETE message in the Evolved Packet System (EPS) protocol?
Option 1: To initiate an attach procedure from the User Equipment (UE) to the network.
Option 2: To reject an attach request from the UE to the network.
Option 3: To confirm the completion of an attach procedure from the UE to the network in response to an ATTACH ACCEPT message.
Option 4: To request additional information from the network during an attach procedure.
Explanation: The ATTACH COMPLETE message is sent by the User Equipment (UE) to the network as a response to an ATTACH ACCEPT message, indicating that the UE has completed the attach procedure. This message confirms the successful attachment of the UE to the network.