What can you connect to an RJ-45 jack?

An RJ-45 jack is primarily used for connecting Ethernet cables, which facilitate wired network connections for computers, routers, switches, and other networking devices. It can also be connected to VoIP phones and certain types of security cameras that utilize Ethernet for data transmission. Additionally, some devices may use RJ-45 jacks for connecting to network-enabled printers and smart home devices.