What is the RJ45 port on a gigabit switch?

The RJ45 port is the built-in port of the Gigabit switch and follows the 1000BASE-T Ethernet standard. Only RJ45 cables (Cat5e/Cat6/Cat7) with 1Gbit/s transmission are supported, and the distance is limited to 100m (330ft). Therefore, 1000BASE-T switches with RJ45 ports can be used for server switching in data centers, LANs, uplinks to desktop switches, or direct-to-desktop broadband applications. FS S3800-24T4S stacking switch is such a 1000BASE-T switch, with one console port, 24 *10/100/1000BASE-T RJ45 ports and 4 *10GbE SFP+ ports. So when connecting two RJ45 port Gigabit switches, there is a simple and direct method: directly insert a standard Ethernet cable (Cat5/5e/6/6a) to connect the two switches