Question: In the construction of a Routing Area Identity (RAI) Fully Qualified Domain Name (FQDN) for EPC, what is the correct order of elements from right to left?
Option 1: MCC, MNC, LAC, RAC
Option 2: MCC, MNC, rac.epc, lac<LAC>.rac<RAC>
Option 3: MCC, MNC, epc, rac (with RAC and LAC in their respective places within the "rac" and "lac" labels)
Option 4: LAC, RAC, MNC, MCC
Explanation: The correct order from right to left starts with top-level domain elements, followed by MCC and MNC (as part of the Home Network Realm/Domain), then "epc" denoting the network type, and finally the structured "rac" and "lac" elements containing RAC and LAC values, as correctly represented by Option 3.