Question: What is the primary purpose of the authentication procedure in a GSM network?
Option 1: To permit the mobile station to authenticate the network and establish a secure connection.
Option 2: To allow the network to check the identity provided by the mobile station and provide parameters for calculating a new GSM ciphering key.
Option 3: To enable the mobile station to calculate a new GSM ciphering key without involving the network.
Option 4: To establish a GSM security context in the MS and the network only in A/Gb mode.
Explanation: The authentication procedure serves two main purposes: first, it allows the network to verify the identity provided by the mobile station; second, it provides parameters that enable the mobile station to calculate a new GSM ciphering key. This ensures secure communication between the mobile station and the network.