The Modbus protocol:

A) transmits information over serial lines between devices.
B) uses the master-slave technique communication technique.
C) is an open protocol.
D) all of these.

Modbus Protocol

A communication protocol developed for industrial applications to allow devices to communicate over different types of networks.

Master-Slave Technique

The master-slave technique is a method of controlling or operating multiple devices where one (the master) controls the operation of the others (the slaves), ensuring coordinated actions.