MikroTik CRS310‑1G‑5S‑4S+OUT blends a single Gigabit RJ45 port with nine fiber slots—five SFP and four SFP+—for dense, high‑speed links. Its RouterOS L stack delivers routing, VLANs, QoS, and security, while PoE on the Ethernet port powers devices directly. The IP54 housing shields against dust and splashes, making it suitable for outdoor or industrial deployments.