Based on the requirements, what should be factored into the physical design when implementing backup...

The factor that should be considered in the physical design when implementing backup copy jobs between sites is to use physical servers for the Veeam backup proxies at each site. A Veeam backup proxy is a data mover component that performs data processing and transfer tasks for backup and backup copy jobs. A physical server is preferred over a virtual server for better performance, reliability, and isolation. A physical server can also leverage hardware encryption offload to reduce CPU load and network traffic encryption to secure data in transit.