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Question 40/62
Which is a physical layer standard for serial communications between two or more devices?
Available Choices (select all choices that are correct)
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Correct Answer: A
RS232 is a physical layer standard for serial communication between two or more devices. It defines the electrical characteristics, timing, and pinout of connectors for serial data transmission. RS232 is widely used in industrial communication devices, such as PLCs, measuring instruments, and network servers. RS232 allows only one master and one slave to communicate on each line, and operates in a full duplex mode. RS232 haslower transmission speed, shorter maximum cable length, and larger voltage swing than later standards such as RS422 and RS485123 References: 1: Basics of RS232, RS422, and RS485 Serial Communication 2: RS-232 - Wikipedia 3: RS232 Serial Communication Protocol: Basics, Working & Specifications
- Question List (62q)
- Question 1: In a defense-in-depth strategy, what is the purpose of role-...
- Question 2: How can Modbus be secured?
- Question 3: Which of the following ISA-99 (IEC 62443) Reference Model le...
- Question 4: What is a key feature of the NIS2 Directive?...
- Question 5: In what step of the development process of the CSMS is "Esta...
- Question 6: What type of cyberattack was discussed in the Ukrainian powe...
- Question 7: What is Modbus?
- Question 8: What are three possible entry points (pathways) that could b...
- Question 9: Which of the following is an industry sector-specific standa...
- Question 10: What is the name of the protocol that implements serial Modb...
- Question 11: What is a commonly used protocol for managing secure data tr...
- Question 12: Which of the following tools has the potential for serious d...
- Question 13: Which of the following is a trend that has caused a signific...
- Question 14: In the context of global frameworks, what does the acronym S...
- Question 15: What impact do increasing cybercrime attacks have?...
- Question 16: What is the purpose of ICS-CERT Alerts?...
- Question 17: Which standard is recognized as part of the NIST CSF Informa...
- Question 18: What is the definition of "defense in depth" when referring ...
- Question 19: Which of the following PRIMARILY determines access privilege...
- Question 20: Which layer in the Open Systems Interconnection (OSI) model ...
- Question 21: What is one challenge associated with firewalls?...
- Question 22: Safety management staff are stakeholders of what security pr...
- Question 23: Which model describes relationships between assets within an...
- Question 24: What is recommended to use between the plant floor and the r...
- Question 25: Whose responsibility is it to determine the level of risk an...
- Question 26: Which of the following technologies is no longer considered ...
- Question 27: Which activity is part of establishing policy, organization,...
- Question 28: What are the two sublayers of Layer 2? Available Choices (se...
- Question 29: Which is the implementation of PROFIBUS over Ethernet for no...
- Question 30: Which of the following provides the overall conceptual basis...
- Question 31: After receiving an approved patch from the JACS vendor, what...
- Question 32: Which of the following starts at a high level and includes a...
- Question 33: Which communications system covers a large geographic area? ...
- Question 34: Which service does an Intrusion Detection System (IDS) provi...
- Question 35: How can defense in depth be achieved via security zones?...
- Question 36: Multiuser accounts and shared passwords inherently carry whi...
- Question 37: Which is a role of the application layer? Available Choices ...
- Question 38: Which of the following is a recommended default rule for IAC...
- Question 39: Which is a commonly used protocol for managing secure data t...
- Question 40: Which is a physical layer standard for serial communications...
- Question 41: Which of the following attacks relies on a human weakness to...
- Question 42: Which of the following is NOT a general class of firewalls?...
- Question 43: Which steps are part of implementing countermeasures? Availa...
- Question 44: What is a key aspect of the relationship between physical se...
- Question 45: What do the tiers in the NIST CSF represent?...
- Question 46: Which policies and procedures publication is titled Patch Ma...
- Question 47: Security Levels (SLs) are broken down into which three types...
- Question 48: Which is a common pitfall when initiating a CSMS program? Av...
- Question 49: What is the purpose of ISO/IEC 15408 (Common Criteria)? Avai...
- Question 50: What is TRUE regarding safety systems?...
- Question 51: Why is patch management more difficult for IACS than for bus...
- Question 52: Which is the BEST deployment system for malicious code prote...
- Question 53: Which is the PRIMARY responsibility of the network layer of ...
- Question 54: What does the first group of the ISA/IEC 62443 series focus ...
- Question 55: Which of the following BEST describes a control system?...
- Question 56: Which of the following BEST describes 'Vulnerability'?...
- Question 57: How many maturity levels (ML) are established for evaluation...
- Question 58: In an IACS system, a typical security conduit consists of wh...
- Question 59: What is the name of the missing layer in the Open Systems In...
- Question 60: Which is the PRIMARY reason why Modbus over Ethernet is easy...
- Question 61: What is the primary audience for Part 2-5 of the ISA/IEC 624...
- Question 62: What is a frequent mistake made with cybersecurity managemen...
