A new version of RIP, called RIP version 2, expands the functionality of RIP version 1 to include the following:
Support for next-hop addresses, which allows for optimization of routes in certain environments.
Multicasting.
RIP version 2 packets can be multicast instead of being broadcast, reducing the load on hosts that do not support routing protocols.
Note
If you are using RIP with supernetting/Classless Inter-Domain Routing (CIDR), you must use RIPv2 only.