CompTIA Exam PT0-003 Topic 3 Question 11 Discussion

Security: It includes mechanisms for reliable and deterministic data transfer, not typically sending information in cleartext.

DNP3 (Option B):

Security: While the original DNP3 protocol transmits data in cleartext, the DNP3 Secure Authentication extensions provide cryptographic security features.

Modbus (Answer: C):

Security: Modbus transmits data in cleartext, which makes it susceptible to interception and unauthorized access.

Security: PROFINET includes several security features, including support for encryption, which means it doesn't necessarily send information in cleartext.

Conclusion: Modbus is the protocol that most commonly sends information in cleartext, making it vulnerable to eavesdropping and interception.

PROFINET (Option D):