Question: What is the primary purpose of the TMSI reallocation procedure in a mobile network?
Option 1: To provide identity confidentiality and protect users against being identified and located by an intruder.
Option 2: To optimize network resources and reduce signaling overhead.
Option 3: To improve handover performance between different location areas.
Option 4: To enhance the security of data transmission over the radio interface.
Explanation: The TMSI reallocation procedure is designed to provide identity confidentiality, which means protecting users' identities from being identified and located by unauthorized parties. This is achieved by allocating a Temporary Mobile Subscriber Identity (TMSI) to each IMSI attached mobile station, making it difficult for intruders to track the user's location and identity.