Explainer: How 2.5 Gbps Ethernet ports on routers actually work
Routers increasingly include 2.5 Gbps Ethernet ports, but using them at full speed requires a matching 2.5 Gbps port on the connected device and a Cat5e or newer cable. Internet-bound speeds are still capped by your ISP plan, though local network tasks like NAS backups can reach full 2.5 Gbps speed regardless of internet plan.