Filter-based forwarding requires a match filter, a routing instance, and which of the following?

Filter-based forwarding is a technique used in networking to direct traffic based on specific criteria defined in a match filter. This method allows for a more granular approach to routing by directing packets based on defined characteristics rather than solely relying on traditional IP routes.

In the context of filter-based forwarding, a routing instance is essential as it defines the separate routing environment for the matched traffic. Additionally, a match filter specifies the criteria that the incoming packets must meet to be processed by this routing instance. The presence of a RIB (Routing Information Base) group is crucial because it provides the actual routing information that corresponds to the match filter for the traffic that is being forwarded.

The RIB group holds the routing information needed for the forwarding decisions and facilitates the separation of routing information for different instances, allowing for more flexible and efficient traffic management. Thus, the requirement for a RIB group, along with a match filter and a routing instance, is key to implementing filter-based forwarding.

The other potential choices do not fulfill the same role in this context. While a next hop is indeed a critical component of routing, it is generally determined once a route is selected, which is not the primary requirement for filter-based forwarding setup. A route map and a policy map are related concepts but