Week 7 - Q's Flashcards
Traditional Modbus was deployed over which communication standards?
A. RS-999 and RS-111
B. RS-232 and RS-485
C. Ethernet and Wi-Fi
D. Bluetooth and Zigbee
B
By default, which port is reserved for Modbus communication?
A. 8080
B. 502
C. 80
D. 443
B
What is a primary security concern of ModbusTCP?
A. It was designed with AES encryption.
B. It uses digital signature verify authenticity and integrity of transactions.
C. It was designed with no security.
D. It requires two factor authentication (2FA) verification for all commands.
C
Which of the following is a limitation of standard Modbus regarding data types?
A. It supports floating point numbers.
B. It can interpret string data.
C. It only supports Boolean and 16-bit unsigned integers.
D. It uses structured query language (SQL) tables.
C
In the context of Modbus, what does a ‘client’ typically do?
A. Holds data for the server to read.
B. Routinely polls each field device to look for data changes.
C. Establishes security measures for the network.
D. Waits until server initiates the communication.
B
