Each device has a dedicated P2P connection to the server, and they can only communicate with each other indirectly through the central hub. It's high-performing as no data collisions will occur. Simply put, it defines how network devices are connected. Can two switches with optical ports be directly connected by optical fiber? Yes, the main line of the optical fiber LAN is a direct. Can two switches with fiber ports be directly connected through fiber ports? The answer is yes. Whether you're using Cisco, Planet, TP-Link, D-Link, Ubiquiti, or any other brand — the key is understanding SFP compatibility.