Parts of a computer

USB port and RAM

what is a USB port

A USB port is a standard cable connection interface on personal computers and consumer electronics. USB ports allow stand-alone electronic devices to be connected via cables to a computer or to each other.
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what can plug into a USB port?

Many types of consumer electronics support USB interfaces. These types of equipment are most commonly used for computer networking:

  • USB network adapters
  • USB broadband and cellular modems for Internet access
  • USB printers to be shared on a home network
  • For computer-to-computer file transfers without a network, USB keys are also sometimes used to copy files between devices.

Multiple USB devices can also be connected to each other using a USB hub. A USB hub plugs into one USB port and contains additional ports for other devices to connect subsequently.

Desoldering a mini USB Port

usage model

Connect two devices directly with one USB cable by plugging each end into a USB port. If using a USB hub, plug a separate cable into each device and connect them to the hub individually.

You may plug cables into a USB port at any time regardless of whether the devices involved are powered on or off. However, do not remove cables from a USB port arbitrarily, as this can lose or corrupt data. Follow instructions provided with your equipment before unplugging USB cables.


Many PCs feature more than one USB port, but do not plug both ends of a cable into the same device, as this can cause electrical damage.

RAM?

what is a RAM?

RAM (pronounced ramm) is an acronym for random access memory, a type of computer memory that can be accessed randomly; that is, any byte of memory can be accessed without touching the preceding bytes. RAM is the most common type of memory found in computers and other devises, such as printers
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types of RAM?

There are two different types of RAM:

  • DRAM (dynamic random access memory)
  • SRAM (static random access memory).

The two types of RAM differ in the technology they use to hold data, with DRAM being the more common type. In terms of speed, SRAM is faster. DRAM needs to be refreshed thousands of times per second while SRAM does not need to be refreshed, which is what makes it faster than DRAM.

What is Random Access Memory (RAM)