Question: In a GPRS network, how would an SGSN with ID `9A`, MNC `5`, and MCC `234` be logically named in a DNS server, following the defined naming convention for GSNs (GPRS Support Nodes)?
Option 1: sgsn009A.mnc005.mcc234.gprs
Option 2: sgsn9A.mnc05.mcc234.gprs
Option 3: sgsn009A.mnc005.mcc234.gprs
Option 4: sgsn09A.mnc5.mcc0234.gprs
Explanation: According to the naming convention, SGSN ID `9A` becomes `009A` (padding with '0' to fill 4 digits), MNC `5` becomes `005` (padding with '0' to fill 3 digits), and MCC `234` remains unchanged. Thus, the correct logical name is `sgsn009A.mnc005.mcc234.gprs`.