Question: In a GSM access network, what is the significance of the value 'n=111' for the Ciphering Key Sequence Number in the EFKc file?
Option 1: Indicates the use of a default ciphering key
Option 2: Signals the completion of the administrative phase
Option 3: Denotes that the ciphering key is not available
Option 4: Triggers an update of the ciphering key Kc
Explanation: The value 'n=111' signifies that the ciphering key is not available, highlighting an important aspect of key management in GSM networks for secure communication.