Content

| 4.1 |  | RIP v2 Overview |
| 4.1.2 |  | Issues addressed by RIP v2 |

The following four features are the most significant new features added to RIP v2:

- Authentication of the transmitting RIP v2 node to other RIP v2 nodes – RIP v2 added support for the authentication of the node that is transmitting response messages. Response messages are used to propagate routing information throughout a network. Authenticating the originator of a response message was intended to prevent routing tables from being corrupted with illegitimate routes from a fraudulent source.
- Subnet Masks – RIP v2 allocates a 4-octet field to associate a subnet mask to a destination IP address. When used in tandem, the IP address and its subnet mask enable RIP v2 to specifically identify the type of destination to which the route leads. This allows RIP v2 to route to specific subnets, regardless of whether the subnet mask is fixed or of variable length.
- Next Hop IP addresses – The inclusion of a Next Hop identification field helps make RIP v2 more efficient than RIP v1 by preventing unnecessary hops. This feature is particularly effective for network environments using multiple routing protocols simultaneously. Some routes go undiscovered when there are multiple or dissimilar routing protocols.
- Multicasting RIP v2 messages – Multicasting is a technique for simultaneously advertising routing information to multiple RIP or RIP v2 devices. Multicasting is beneficial whenever multiple destinations must receive the identical information. The conventional solution to this problem would be to generate separate packets containing identical payloads specifically addressed to each machine. Multicasting enables packets to be simultaneously delivered to multiple machines. This reduces overall network traffic and reduces the processing load of the source machine.

| Interactive Media Activity Drag and Drop: RIP v1 and RIP v2 Comparison Table Upon completion of this activity, the student will be able to identify the differences between RIP v1 and RIP v2.