The RJ45 connector is the most used interface in data communications.In Ethernet networks, this proven connector assures quick, secure communications between all devices connected in a network.
Ethernet Cable Colors: Color Code Standards
By looking at a T-568A UTP Ethernet straight-thru cable and an Ethernet crossover cable with a T-568B end, we see that the TX (transmitter) pins are connected to the corresponding RX (receiver) pins, plus to plus and minus to minus. You can also see that both the blue and brown wire pairs on pins 4, 5, 7, and 8 are not used in either standard. What you may not realize is that, these same pins 4, 5, 7, and 8 are not used or required in 100BASE-TX as well. So why bother using these wires, well for one thing its simply easier to make a connection with all the wires grouped together. Otherwise you'll be spending time trying to fit those tiny little wires into each of the corresponding holes in the RJ45 connector.
RJ45 to USB | USB to RJ45
USB to RJ45 10/100 Ethernet Network Adaptor Converter
Price:$2.7(For Reference only)
This USB 10/100 Ethernet Adapter for PC computers is the easiest solution for connecting your laptop and/or desktop computers to a broadband Internet modem, or building a 10/100 Base-T Ethernet network.
Easy to install, the adapter plugs into any available USB port and lets you connect your PC to a cable or DSL modem, as well as share files and peripherals with computers that are connected to the network.
This simple solution adds an RJ45 Ethernet port to your PC without opening the computer.
Plugable USB 2.0 to 10/100 Fast Ethernet LAN Network RJ45 Adapter
Price:$15.26(For Reference only)
Providing Fast Ethernet connectivity over USB, the Plugable USB 2.0 to 10/100 Network Adapter has a compact external design and wide compatibility with its ASIX AX88772 chipset. Two LEDs montior power and link activity. Support for this adapter built in to Nintendo Wii (no driver required). Wired ethernet via this adapter provides faster and more reliable Netflix streaming, game downloads, and network access than the Wii's built-in wireless networking (up to 2-3x as fast). 32/64-bit drivers for Windows 7, Vista, XP, 2000, ME, and 98SE. Not compatible with ARM-based Windows (MS Surface). Drivers built in to Mac OS Lion 10.7+. Drivers for older versions of Mac OS X 10.4, 10.5 and10.6 (requires the latest driver download from ASIX). Driver for Linux kernel 2.6.9+ (may require building kernel module). Included in package are the adapter, driver disk, and quick start guide.
USB TO LAN RJ45 Ethernet 10Mb/100Mb Network Adapter
Price:$2.99(For Reference only)
One end has the USB A Female end like the USB socket on a PC. The other end is the 8P8C (RJ45) Male Plug. Pin Assignment: USB A Female - RJ45Plug 1 - 1 2 - 2 3 - 3 4 - 6 S - S; The main use for this adaptor is to connect a USB ADSL modem to a router with an RJ45 socket but the modem must have a separate power source. These adaptors can also be used with a range of telephony applications such as VOIP and mobile phone unlocking / programming etc.
RJ45 to DB9 | DB9 to RJ45
DB9 to RJ45 Cat5 Ethernet Adapter Cable for Router Network
Price:$3.66(For Reference only)
This Cisco Console Cable contains a Male RJ-45 connection and a Female DB-9 Serial connection. The DB9 to RJ45 Cable is used to console into commercial grade networking equipment such as routers, firewalls, and managed switches. ThisCisco Console RJ45 Cable will work with Cisco equipment as well as all other network devices that contain console ports.RJ45-232, 1-8, 2-6, 3-2, 4-5, 5-5, 6-3, 7-4, 8-7 This includes Juniper ( Netscreen ), HP, WatchGuard ( Firebox ), SonicWall, etc.