Question: What is the typical mode used by the network to send a TMSI REALLOCATION COMMAND message to the mobile station?
Option 1: Unciphered mode using a CCCH channel
Option 2: Ciphered mode using a RR connection
Option 3: Unciphered mode using a DCCH channel
Option 4: Ciphered mode using a BCCH channel
Explanation: The network typically sends the TMSI REALLOCATION COMMAND message to the mobile station in ciphered mode, using a RR connection, to ensure secure communication and protect sensitive information such as the new TMSI and LAI combination.