Specialised Cards

Network Card:
A network card is a interface card which is a piece of computer hardware designed to allow computers to communicate over a computer network, as it provides physical access to a networking medium and provides a low-key system.

Video Card:
A video card is a hardware component whose function is to generate and output images to display.

How the network card communicate with the computer?
The network card usually has two indicator lights (LEDS)
The green light shows that the card is receiving electricity and the orange or red light indicates that the network Is in activity (eg sending or receiving data), as you can see in the image.

To prepare that data to be sent to the network card, it uses a transceiver, which transforms parallel data into serial data. Each card has a unique address, called a MAC address, which is assigned by the cards manufacturer, which lets the card have unique identification in all the network cards in the world.

To ensure that the computer and network are capable the card must be suitable for the computers data bus architecture, and have the appropriate type of socket for the cable. Each card is designed to work with a certain kind of cable. some cards include multiple interface connectors.

How the video card communicate with the computer?
The video card or Graphical Processing Unit (GPU) is the spirit of the graphics card. The graphics card usually processes images before they are base on the computer screen.

This GPU is a specialized processor which has advanced image processor capabilities, especially for 3D graphics. This is because of the high temperature of the graphics card processor can reach; the fan can be mounted on to it. The job of the video memory is to store images processed by the GPU before they are displayed on the monitor.

The larger the memory of the video the better the graphics card can handle textures when displaying 3D scenes.