Apple ACPT Certification Exam 9L0-402

This is what you normally 9L0-509 find on the end of a traditional parallel printer cable on a PC. This connector type is also used frequently for equipment that conforms to RS-232 serial data communication as well, so don't always assume if you see one of these connectors that it is always parallel. When the original RS-232 specification was Apple 9L0-402 written, this was originally the kind of connector that was intended, but because many of the pins were seldom if ever used, it was switched to the connectors on more recent equipment like the original IBM-PC (yes, that is comparatively recent equipment for this standard).
Male connectors 9L0-509 are usually used on a PC for parallel data communication, which is beyond the scope of this series of articles. However, you should still be aware that this connector is also used for serial communications on many different types of equipment. In fact, if you have a random piece of equipment that you are trying to see how it 9L0-402 study guide works, you can presume that it is a piece of serial equipment. Hacking random connectors is also beyond the scope of this document, but it can be an interesting hobby by itself.