Computer Fundamental

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» Central Processing Unit » ALU & CU » CPU Registers » Motherboard » Ports and Interfaces » Processor » Types of Processors

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MCQ on Fundamental of Computer

Ports and Interfaces

Ports and Interfaces

Motherboard has a certain number of I/O sockets that are connected to the ports and interfaces found on the rear side of a computer. You can connect external devices to the ports and interfaces, which get connected to the computer’s motherboard.

Ports on the rear side of a PC

Ports on the rear side of a PC

» Serial Port — to connect old peripherals.
» Parallel Port — to connect old printers.
» USB Ports — to connect newer peripherals like cameras, scanners and printers to the computer. It uses a thin wire to connect to the devices, and many devices can share that wire simultaneously.
» Firewire - It is another bus, used today mostly for video cameras and external hard drives.
» RJ45 connector - It (called LAN or Ethernet port) is used to connect the computer to a network. It corresponds to a network card integrated into the motherboard.
» VGA connector for connecting a monitor. This connector interfaces with the built-in graphics card.
» Audio plugs (line-in, line-out and microphone), for connecting sound speakers and the microphone. This connector interfaces with the built-in sound card.
» PS/2 port to connect mouse and keyboard into PC.
» SCSI port for connecting the hard disk drives and network connectors.

Expansion Slots

The expansion slots are located on the motherboard. The expansion cards are inserted in the expansion slots. These cards give the computer new features or increased performance. There are several types of slots:
» ISA (Industry Standard Architecture) slot — To connect modem and input devices.
» PCI (Peripheral Component InterConnect) slot — To connect audio, video and graphics. They are much faster than ISA cards.
» AGP (Accelerated Graphic Port) slot — A fast port for a graphics card.
» PCI (Peripheral Component InterConnect) Express slot — Faster bus architecture than AGP and PCI buses.
» PC Card — It is used in laptop computers. It includes Wi-Fi card, network card and external modem.

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