thinQmaster Virtual testing partner Adaptive practice exams that find your weak spots and drill them. Every answer explained. From $69
Enroll

thinQmaster

Find your exam

Five questions free, before you decide.

Step 1 · choose a vendor

In one of our camps? Your practice exams come with the tuition — they are on your study page already.

Application & OT Security · Advanced

PROFINET

An industrial Ethernet standard from PROFIBUS & PROFINET International, widely used with Siemens automation for real-time device communication.

Definition

PROFINET supports real-time (RT) and isochronous real-time (IRT) communication for motion control. Security has historically relied on network segmentation; newer specifications add security classes with authentication and integrity protection.

Example

A Siemens PLC exchanges cyclic I/O with remote drives over PROFINET RT.

Exam tip

Recognize as a Siemens-associated industrial Ethernet protocol.

Related terms