2. System Devices
• Interface or point of attachments.
• Connect peripheral devices with computer
Ports at the rear of the computer
Ports at the front of the computer
Ports
3. System Devices
• 9-pin port.
• Transfer one bit at a time
(Kbps)
• Connect External modems
• 25-pin port
• Transfer many bit at a time (Mbps)
• Connect printers, external hard disks etc.
Serial port -
Parallel port -
4. System Devices
used to connect a monitor to the computer system.
• VGA port -
→ Connect CRT
• DVI (Digital Visual Interface) port -
→ Connect LCD
• HDMI (High-Definition Multimedia Interface) port –
• Connect LED
Video port -
5. System Devices
PS/2 port -
•Used to connect keyboards and mouse to the computer.
•Keyboard - purple
•Mouse - green
Ethernet port -
•Used to connect a computer to a network.
•Known as RJ45
•Transfer rate (Gbps)
6. System Devices
•Used to input and output audio from the computer.
• Light blue - Connect external devices
• Lime - Connect speakers
• Pink - Connect a microphone.
Audio ports -