CAS CAS Automation Specialist Network Communications & Protocols 3

Question 1

In PROFINET IO, what is the role of the IO Controller?

Accepted Answer

It runs the automation program and communicates with IO Devices

Answer

It provides power to the fieldbus devices

Answer

It converts PROFINET signals to Modbus RTU

Answer

It stores configuration data for the entire network

Question 2

Which feature of managed industrial Ethernet switches is critical for ensuring real-time performance in motion control applications?

Accepted Answer

IEEE 1588 Precision Time Protocol (PTP) support

Answer

DHCP server capability

Answer

HTTP web management interface

Answer

SNMP v3 authentication

Question 3

What does the acronym 'CIP' stand for in the context of EtherNet/IP and DeviceNet?

Accepted Answer

Common Industrial Protocol

Answer

Control Interface Protocol

Answer

Cyclic I/O Protocol

Answer

Controller Instruction Protocol

Question 4

In industrial networking, what is the primary advantage of using a ring topology with Media Redundancy Protocol (MRP)?

Accepted Answer

Automatic network recovery within milliseconds after a cable break

Answer

Reduced cable cost compared to star topology

Answer

Higher bandwidth than star topology

Answer

Elimination of the need for managed switches

Question 5

Which function block in IEC 61131-3 is commonly used to send explicit Modbus TCP read requests from a PLC to a remote device?

Accepted Answer

MODBUS_CLIENT

Answer

READ_VAR

Answer

TCP_SEND

Answer

NET_CONNECT

Question 6

What is the maximum data rate supported by the FOUNDATION Fieldbus H1 physical layer?

Accepted Answer

31.25 kbps

Answer

1.5 Mbps

Answer

12 Mbps

Answer

100 Mbps

Question 7

When configuring VLANs on an industrial managed switch, what is the primary security benefit in an automation network?

Accepted Answer

Isolating control traffic from corporate IT or guest networks

Answer

Increasing network bandwidth for all devices

Answer

Eliminating the need for network firewalls

Answer

Providing encrypted communication between PLCs