Question: In a Public Land Mobile Network (PLMN), what is the composition of the Mobile Country Code (MCC) as defined in the PLMN-Identity information element?
Option 1: MCC consists of a single digit (0..9)
Option 2: MCC comprises a sequence of 2 digits (0..9 each)
Option 3: MCC is made up of a sequence of exactly 3 digits (0..9 each)
Option 4: MCC can vary between 1 to 5 digits (0..9 each)
Explanation: The correct composition of the Mobile Country Code (MCC) is defined as a sequence of exactly 3 digits, with each digit ranging from 0 to 9. This specificity ensures unique global identification of mobile networks by country, highlighting the importance of precise formatting in telecom network identifiers for effective international roaming and network interoperability.