CompTIA Updated CAS-004 Exam Questions and Answers by kaleb

Step by Step Explanation:

IAST (Interactive Application Security Testing): Combines both dynamic and static testing techniques and is highly suited for securing SaaS applications by providing insights into runtime and code-level issues.

DAST (Dynamic Application Security Testing): Focuses on runtime vulnerabilities but lacks code-level analysis.

SAST (Static Application Security Testing): Analyzes source code but does not address runtime vulnerabilities.

ZAP (OWASP ZAP) is a DAST tool similar to Burp Suite, providing redundant functionality rather than new protections.

Step by Step Explanation:

Dynamic analysis involves testing the application while it is running to identify vulnerabilities present during execution, providing the most exhaustive runtime vulnerability detection.

Input validation is a specific security control, not a method for exhaustive testing.

Side-channel analysis examines unintended information leakage but does not comprehensively assess runtime vulnerabilities.

Fuzz testing is a specific technique within dynamic analysis but does not ensure exhaustive coverage.

Static analysis examines code without execution, missing runtime-specific vulnerabilities.

The protocol described is Modbus, which is a commonly used industrial protocol that lacks built-in authentication and security features. Modbus operates in a client/server model and can be implemented over RTU (Remote Terminal Unit) or TCP/IP for communication between devices. The other protocols mentioned either have different characteristics or are used in different contexts (such as Profinet for industrial automation, Zigbee for wireless IoT devices, and Z-Wave for home automation). CASP+ identifies Modbus as a critical protocol in industrial environments that lacks security and requires additional protective measures.

References:

CASP+ CAS-004 Exam Objectives: Domain 4.0 – Industrial Control Systems (ICS) and Modbus Protocol

CompTIA CASP+ Study Guide: Industrial Protocols and Modbus Security

In a SaaS cloud service model, the client is typically responsible for the data, including its security and compliance aspects. The SaaS provider would handle the infrastructure, including physical security and network security, but the client must ensure the data they input into the SaaS application is protected in line with their own security policies and compliance requirements.