Fotis wants to deploy redundant core routers, as shown in the diagram. What model of high availability clustering will provide him with the greatest throughput?

An active/active pair can use the full throughput capability of both devices, but normal deployment models will design to the maximum throughput of a single device to avoid disruption in the event that one of the pair fails. Active/passive designs can only handle the throughput of a single device and allow the secondary device to remain ready to operate but not passing traffic until it is needed. Line interactive is a term often used to describe UPS systems that filter power instead of passing it through, and near-line is a term used to describe backups that are not online but can be retrieved relatively quickly.