Whats a dongle?
I feel like Im missing something here....
Ever heard of pendrive etc.??
It has the same shape but have different function altogether.
For example a bluetooth dongle. Some computer don't have bluetooth so they buy an external bluetooth device and attach it to the computer so that the computer can receive bluetooth signal and do transfer files
Internet dongle is the same thing but it's function is the same as wifi card place on your laptop, only working on external. The same as bluetooth above