What are ports?
Ports are like the entrances of a house for a computer. There are
many, you have the entrance door, you have windows, you can enter by the
fireplace… so as a computer. Same things, you have many ports, some of
them are used to be locations by which some entries are used to like
800, 597… As a cat door house, ports can be opened, closed or just to
make pass in only one way.