RJ 45

RJ 45 or LAN Cable is a connector for computer network (Ethernet) cables.

Straight Cable


It used in the context of Local Area Networks a straight through cable is a network cable used to connect a computer to a network hub or router. It cannot be used to connect a two computers directly. It usually use straight cable to connect different type of devices. This type of cable will be used most of the time and can be used to:

1. Connect a computer to a switch/hub's normal port.
2. Connect a computer to a cable/DSL modem's LAN port.
3. Connect a router's WAN port to cable/DSL modem's LAN port.
4. Connect a router's LAN port to a switch/hub's uplink port.
5. Connect 2 switches/hubs with one of the switch/hub using an uplink port and the other one using normal port.

Crossover Cable

Is a type of twisted pair copper wire cable for LAN's in which the wires on the cable are crossed over so that the receive signal pins on the RJ-45 connector on one end are connected to the transmit signal pins on the RJ-45 connector on the other end. Sometimes it will use crossover cable and used to connect same type of devices. A crossover cable can be used to:

1. Connect 2 computers directly.
2. Connect a router's LAN port to switch/hub's normal port.
3. Connect 2 switches/hubs by using normal port in both switches/hubs.