The simple answer is that there aren't enough wires; RJ11 has 4 wires, and RJ-45 uses 8 wires. In addition, the RJ11 wire is not twisted, so there is a problem with crosstalk.
Because it's a standard, nobody made anything better yet (cost/speed ratio).
the popular connector used in lan network is RJ45
If you mean a standard 10/100 type Network Interface Card (nic), then you connect it with a CAT5 or CAT6 cable, the connector on the end is known as an RJ45.
Computers connect to the Internet via a network interface card (NIC) or wireless LAN adapter (WiFi adapter). Historically, computers could also connect to the Internet via a built-in modem for use with telephone lines.
A NIC or Network Interface Card/Connection. Your computer should have a LAN interface. You can identify it with RJ45 socket (has 8 pin connector slightly bigger than a telephone socket). If it is there already ensure than the LAN port is enabled in operating system. This port need to be connected to a working LAN network socket which comes through a switch/hub/router.
1) connect the ip phone to the ethernet LAN using an rj45 connector 2) establish an internet connection then use an analog telephone adapter.
I use LAN
An Ethernet (RJ45) connection can be found on a network card.
If you use a network at all in a home situation then a LAN is common.
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.
LAN refers to a Local Area Network. The LAN is used to network computers within a limited area like school, building or computer laboratory by using the network media.
Full Form of LAN : Local Area Network. The use of LAN (Local Area Network) two or more computers connected with in geographical location
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