Question: What is the basis on which an IP v4 address can be allocated to a Mobile Station (MS) in a PLMN?
Option 1: Either permanently or temporarily during a connection with the network.
Option 2: Only permanently, as temporary allocations are not supported.
Option 3: Based on the type of service subscribed by the MS.
Option 4: Depending on the availability of IP address domains in the PLMN.
Explanation: According to the telecom standards, an IP v4 address can be allocated to a Mobile Station (MS) either permanently or temporarily during a connection with the network. This flexibility allows for efficient management of IP addresses within a Public Land Mobile Network (PLMN).