What is an RJ45 Connector used for?
An RJ45 connector is used for connecting an Ethernet network. The cable has eight pins connected to the wires and it goes into the back of the router or modem.
An RJ45 connector and a PCI NIC card are 2 completely different things. An RJ45 (Technically an 8P8C) is the connector at the end of a CAT cable which plugs into a NIC card. Unless you are thinking RJ11, which has nothing to do with CAT cables. An RJ11 is the name of the cable used for single-line dialup modems and telephones, in which case, the connector is called a 6P4C connector.
RJ45 is name of connector types used for Ethernet connections on computers and other Ethernet networking devices like routers and switches and also modems and other devices which support Ethernet interface. - Neeraj Sharma RJ45 is the standard for the plug that you use for connecting cat5 cable to a network. It's an 8 connector plug that looks like a larger version of a phone plug.
RJ45 is a standardized connector most commonly used in Ethernet-based networks. The abbreviation RJ stands for "Registered Jack." RJ45 comes in male and female variants. The male variant features a retaining spring that locks into a slot in the female jack, securing the connection. Asymmetric shape ensures that the connector can only be inserted the right way.
RJ45 is the standard 8P8C telecommunications connector commonly found in computer networks such as Ethernet. RJ45 specifies both the plug and the socket. Connections are typically formed using twisted pair cabling, predominantly Category 5 (CAT5). Ethernet cables may be configured as patch cables or as crossover cables. These two configurations are standardised in TIA/EIA-568 and ISO/IEC 11801. Patch cables are used to connect two different devices, such as when connecting a computer to a network…
The 45 indicates the jack number; RJ45 indicates Registered Jack number 45. However, there is a slight complication - what most people call RJ45 should actually be 8P8C. The RJ numbers used to be allocated by the FCC, but they are now defined by Administrative Council for Terminal Attachment (ACTA).