because all computers have external ports, so you can hook up other peripherals without opening the computer. the internal ones being for other hardware, more permenant such as a sound card.
Depends what you mean by "port", but that word is more often used for external connections that internal ones, so in that case ports are used for external hard drives but not internal ones.
internal external not internal external not
its internal
An Internal CD or DVD drive is a drive that is built in with the computer. As you can imagine a External CD or DVD drive is one that is not built into the computer and is plugged into one of the on board ports.
Is a salmon internal or external?
What is internal and external sources?
internal
external
External. Internal devices would be something like a CD Drive, while an external device is a keyboard or mouse for example.
internal is in and external is out
internal is in and external is out fertilisation