Glossary Term: RJ-45 Ethernet network connections
RJ-45 is the name for the telephone style plastic connector used on Ethernet cables when connecting IP devices such as IP cameras or computers. RJ-45 plugs are 10 x 5 x 20mm in size and have a lug to stop it being connected incorrectly. RJ-45 connections are either male (plug) or female (socket), with female usually being located on the network devices, and have 8 internal wires (4 pairs). 
[...] In home networking terms, Ethernet is a standard for transmitting data. Each device that wishes to communicate will need to have an Ethernet network port and cabling (see RJ-45). [...]