300-915 exam

Refer to the exhibit. Which two statements about MQTT messaging are true? (Choose two.)A . Result code 5 means the connection is accepted; result code 0 means the connection is "refused, not authorized".B . Redundant ClientIDs are supported by MQTT brokers.C . MQTT does not support a "keep alive" functionality...

Which statement explains the correct position of a PLC within the CPwE architecture?A . PLCs are always part of Level 0 C process control.B . PLCs are part of Level 4 C site business planning.C . PLCs are part of Level 1 C basic control.D . PLCs are placed at...