Components - Peripherals & Ports

Overview of Computer Peripherals

• Computer peripherals enhance the functionality of the computer.

• Examples include mouse, keyboard, and monitor.

• Peripherals are external devices connected to a computer.

USB Devices

• USB (Universal Serial Bus): Primary connection type for gadgets.

• USB versions include:

  • USB 2.0: Common older version.

  • USB 3.0: Faster speeds introduced later.

  • USB 3.1: Latest version with enhanced capabilities.

Transfer Speed Units

• Usage of MB (megabytes) vs mb/s (megabits per second):

  • MB: Unit of data storage.

  • mb/s: Unit of data transfer rate.

  • 8 bits = 1 byte: Important for understanding speed differences.

  • Example: To transfer a 1 MB file in one second, at least 8 mb/s speed is necessary.

Compatibility of USB Ports

• Connecting devices:

  • USB 2.0 device can connect to USB 3.0 port, but won’t achieve USB 3.0 transfer speeds.

  • Backward compatibility: Older devices can work with newer ports

USB Port Identification

• USB Type Color Code:

  • USB 2.0 ports are generally black.

  • USB 3.0 ports are typically blue.

  • USB 3.1 ports are usually teal.

  • Note: Colors may vary between manufacturers.

USB Connectors

• USB Type C: New standard for connections, capable of:

  • Data transfer

  • Display output

  • Power delivery

• Becoming increasingly common as a universal connector.

Display Peripherals

• Monitor connections include various standards:

  • DVI:

    • Outputs video only.

    • Not suitable for audio needs.

  • HDMI:

    • Outputs both video and audio.

    • Widely used in TVs and computers.

  • DisplayPort:

    • Supports both video and audio output.

• USB Type C can also manage display outputs along with data transfer and power.

IT Support Considerations

• IT specialists frequently work with USB devices and display devices.

• Ability to distinguish among peripheral types is essential for efficient support.