Which technology allows multiple instances of a routing table to coexist on the same router simultaneously?

VRF creates separate routing table instances on a single physical router, each with its own set of interfaces, routes, and forwarding tables. This allows traffic from different customers or network segments to be completely isolated from one another, which is foundational to MPLS VPN and network virtualization deployments.

Cisco virtual router is not a standard IOS feature or recognized technology name for this function.

Instanced virtual router is not a valid Cisco technology or industry-standard term for multiple routing table support.

IS-IS is a link-state routing protocol and does not provide the capability to maintain multiple independent routing table instances on one device.