WHAT IS THE DIFFERENCE BETWEEN STRAIGHT THROUGH AND CROSS-OVER CABLE?

Connecting a UTP cable involves the use of a RJ 45 connector.  This is an eight-wire connector commonly used to connect devices onto a local area network (LAN)

We need to use the correct color for the appropriated pin in the RJ-45 jack as shown in the table below.

PIN	T568 A	T568 B
1	White/Green	White/Orange
2	Green	Orange
3	White/Orange	White/Green
4	Blue	Blue
5	White/Blue	White/Blue
6	Orange	Green
7	White/Brown	White/Brown
8	Brown	Brown

 

  1.   Straight Through

-   It is used to connect different type of devices.

Example:

Computer – Switch

Switch – Router

Router - Computer

It uses A-A and B-B coding. 

    

    2.   Cross-Over

-   It is used to connect same type of devices.

Example:

Computer – Computer

Switch – Switch

Router - Router

It uses A-B coding.