In which of the following ways does RIPV2 differ from the Routing Information Protocol (RIP)?

RIP version 2 (RIPng) introduces enhancements that address some limitations of the original Routing Information Protocol (RIP). One of the significant differences is the addition of route tagging in the routing table entries. This route tag can be utilized to distinguish between different routing information sources and assist in route filtering, making it easier for routers to determine the origin and reliability of the information. This improvement enhances the functionality and usability of routing tables in environments where multiple routing processes may exist.

The other options describe characteristics that are not true about RIPV2, such as support for variable length subnet masks, which RIPV2 does support to allow for more efficient address space usage. Similarly, RIPV2 does not use a different hop count metric, as it retains the original hop count metric used in RIP, allowing a maximum of 15 hops for route reachability. As such, the correct answer centers on the addition of the route tag feature, highlighting a practical enhancement over the original protocol.