1. RIPv1：
RIPv1 使用有类路由。定期路由更新不携带子网信息，缺乏对可变长度子网掩码 (VLSM) 的支持。这种限制使得在同一网络类中不可能有不同大小的子网。换句话说，一个网络类中的所有子网必须具有相同的大小。也不支持路由器身份验证，使 RIP 容易受到各种攻击。
2. RIPv2：
RIPv2 是 RFC 1723 中定义的无类别距离矢量路由协议。作为无类别路由协议，意味着它在其路由更新中包含带有网络地址的子网掩码。
由于RIPv1的不足，1993年开发了RIP版本2(RIPv2)，具备支持子网信息的能力，支持无类别域间路由(CIDR)。
RIPv1 和 RIPv2 的区别：
| SR.NO | RIPv1 | RIPv2 |
|---|---|---|
| 1. | RIPv1 is a Distance-Vector Routing protocol. | RIPv2 is also Distance-Vector Routing Protocol. |
| 2. | It can supports class full network only. | It can support class full and classless networks. |
| 3. | It does not support for authentications. | It support for authentications. |
| 4. | It hop count limit is 15. | It hop count limit is 15. |
| 5. | It does not support for VLSM and discontinuous networks. | It supports for VLSM and discontinuous networks. |
| 6. | It is less secure. | It is more secure. |
| 7. | RIPv1 use Broadcast traffic for updates. | RIPv2 use Multicast traffic for updates. |
| 8. | RIPV1 does not provide trigger updates. | RIPv2 provides trigger updates. |
| 9. | RIPV1 not send subnet mask to routing table. | RIPv2 send subnet mask to routing table. |
| 10. | RIPv1 don’t support manual route summarization. | RIPv2 support manual route summarization. |