RJ45 is the abbreviation for Registered Jack, which is a family consisting of RJ11, RJ12, RJ21, RJ22, RJ50, etc. 45 is the number.
RJ45 is a member of the RJ family.
The RJ45 plug is a metal connector used to connect network cables. It consists of 8 metal contacts and 4 plastic rings, of which 1-2 contacts are used to send data, 3-6 contacts are used to receive data, and 7-8 contacts are used for grounding.
In computer networking, RJ45 is usually used for the following:
Connect the network card: The RJ45 plug can be used to connect the network card of the computer, so as to connect the computer to the local area network or the Internet.
Connecting switches: RJ45 plugs can also be used to connect to network switches to connect multiple computers or network devices together.
Connecting routers: RJ45 plugs can also be used to connect routers to connect multiple network devices together and realize Internet sharing.