What is difference between RIP version and version 2?

Diffrence between Rip v1 and v2 : 

RIPv1 : 

1. It is classfull.
2. It supports VLSM ( Variable length Subnet Mask ) .
3. Messages in Rip v1 are broadcasted to address 255.255.255.255
4. Don't support discontigous subnet mask.
5. Don't support any authentication.
6. Networks are advertised at their classfull boundary.
7. Command  :

Router rip

version 1

exit

Rip v2 : 

1. It is classless.
2. It supports VLSM ( variable lenth subnet mask ) .
3. Provide mechanism to authenticate.
4. By default auto summarization is enabled  to disable it " no auto-summary " 
5. Messaged in Rip v2 are multicast to address 224.0.0.9
6. Supports contiguous and discontiguous subnet mask.

Command : 

router rip

version 2

no auto-summary

exit