Ethernet Cabling Type (Straight-through cable, Crossover cable, Rolled cable)

Ethernet cabling has three type:

1. Straight-through cable
2. Crossover cable
3. Rolled cable.

##Straight-Throught Cable

The straight-throught cable is used to connect:

• Host to Switch or Hub
• Router to Switch or Hub

There are only 4 pins are used in straight-through cable to connect Ethernet devices. 1, 2,3 and 6 are the pins that are used and just connect as below:

• 1 to 1
• 2 to 2
• 3 to 3
• 6 to 6

##Crossover Cable

The crossover cable can be used to connect:

• Switch to switch
• Hub to hub
• Hub to host
• Router direct to host

The same 4 pins are used like straight-throught, but connecting in different way as below:

• 1 to 3
• 2 to 6
• 3 to 1
• 6 to 2

##Rolled Cable

The rolled cable is used to connect host to swicth or router via console serial commnication (com) port. All 8 pins are used and connect as below:

• 1 to 8
• 2 to 7
• 3 to 6
• 4 to 5
• 5 to 4
• 6 to 3
• 7 to 2
• 8 to 1

Reference: CCNA Study Guide