Which objects can be tracked with FHRP to influence priority?

The correct response involves understanding what First Hop Redundancy Protocol (FHRP) can track to influence the priority of a virtual router. FHRPs like HSRP (Hot Standby Router Protocol) and VRRP (Virtual Router Redundancy Protocol) are designed to ensure continuous availability of the default gateway in a network. This is achieved through tracking certain conditions to dynamically adjust the priority of the routers participating in the protocol.

In particular, FHRP can monitor line protocol status as well as routing protocols to determine which router should be the active gateway. If a router's interface goes down (represented by a change in the line protocol), or if a certain route becomes unavailable, the FHRP can adjust the priority dynamically, thus influencing which router takes over as the active member of the group. This ability to track line protocols and routing allows for effective failover and redundancy, ensuring reliable network operations.

Other options do not align with the primary function of FHRP. For instance, tracking IP addresses and VLANs is relevant but doesn't directly influence priority in the context of FHRP protocol operations itself. Performance and bandwidth are operational metrics that do not have a direct role in determining gateway availability through redundancy protocols.