In short, there’s no simple answer to this question because it all
depends on how much you already know, how much you have to learn,
how quickly you learn and when you feel confident enough to take the
exam and pass it.
For example, some classroom training teaches all CompTIA Network+
material in a matter of one week, while others stretch over several
months. If you choose the path to learn on your own, you may,
similarly be able to acquire the necessary knowledge within a few
days, weeks or months, depending on how much knowledge and
experience you already have.
While we cannot tell you how long it will take you to get your
CompTIA Network+ exam, we do recommend that you invest enough time
in your exam preparation and ensure you know what gaps exist instead
of racing through the curriculum.