About vga extension cord

CRT monitors on the design and manufacture of reasons, can only receive analog signal input, which requires graphics input analog signal. VGA mini usb connector‍ is the output of the analog signal on the graphics interface, vga extension cable (Video Graphics Array) port, also called D-Sub connector. Although the LCD monitor can receive digital signals directly, but many low-end products in order to match with VGA interface card, which uses the VGA connector. VGA interface is a D-type interface, there are above 15-pin space, cate5e network cable‍ into three rows, each row of five. VGA graphics card interface is the most widely used type of interface, the vast majority of graphics cards with such an interface.