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