The document discusses three types of expansion cards used in computers: video cards, which generate and output images to displays; sound cards, which facilitate audio input and output for multimedia applications; and network cards, which allow computers to communicate over wired or wireless networks. Video cards are also known as graphic cards and use computer RAM and digital signals to interface with displays. Sound cards provide audio components and require additional cards to enable sound capabilities. Network cards use unique serial numbers stored on the cards to achieve near-ubiquitous connectivity.

2.  Video card
 Sound card
 Network card

3.  Also know as graphic card.
 It is an expansion card.
 Function is to generate and output image to a
display.
 Video card offer added function.
 Operation and provides the instruction.
 Computer and software to interface with card.
 Use the computer ram memory.
 Digital signals produced.

4.  To send a graphic information.
 A video display device such as monitors, tv or
projector.

5.  Facilities the input and output of audio signals.
 Provides the audio component for multimedia
application.
 Such as music component, editing video and
audio, presentation etc.
 Sound capabilities built.
 Require addition expansion card to provide for
audio capability.

6.  Allows computer to communication over a
computer network.
 Use cables or wireless.
 Achieved near ubiqbility.
 A unique 48 bit serial number.
 Store in ROM carried on the card.