Which option are L4-L7 devices registered as on a Cisco APIC?

L4-L7 devices are typically deployed with redundancy and managed as a collection, not usually as a single "virtual device" in the APIC's service graph context.

In Cisco APIC, L4-L7 service devices (like firewalls, load balancers, ADCs) are registered as "device clusters". This allows APIC to manage multiple instances of the same service device as a single logical entity, providing high availability, scalability, and consistent policy enforcement across the cluster members.

While L4-L7 devices are often physical appliances, APIC manages them as logical "device clusters" rather than individual "physical devices" for service graph integration and high availability.

"More virtual devices" is too vague and doesn't align with the specific APIC concept of a "device cluster" for L4-L7 service integration.