Pass the CompTIA CASP CAS-005 Questions and answers with Dumpstech

In serverless computing, organizations rely heavily on CSPs to manage the infrastructure, runtime, and scaling. A key risk is thelevel of control and influence governments have over CSPs, potentially affecting availability, access, or confidentiality of hosted services due to legal orders or government actions. Concerns about virtualization technologies, scalability, or third-party monitoring are valid but less critical compared to the overarching legal and control risks tied to CSP reliance.

Implementing digital signatures ensures the integrity and authenticity of software binaries. When a binary is digitally signed, any tampering with the file (e.g., replacing it with amalicious version) would invalidate the signature. This allows systems to verify the origin and integrity of binaries before execution, preventing the execution of unauthorized or compromised binaries.

A. Improving patching processes: While important, this does not directly address the issue of verifying the integrity of binaries.

B. Implementing digital signatures: This ensures that only valid, untampered binaries are executed, preventing attackers from substituting legitimate binaries with malicious ones.

C. Performing manual updates via USB ports: This is not practical and does not scale well, especially in large environments.

D. Allowing only files from internal sources: This reduces the risk but does not provide a mechanism to verify the integrity of binaries.

Formal methods in software engineering use mathematically based specifications to ensure system correctness, safety, and compliance with requirements. SecurityX CAS-005 stresses the importance of traceability between code and both functional and non-functional requirements for high-assurance systems like avionics. A lack of traceability means it is impossible to verify that the implementation meets all required safety and performance standards—exactly what formal methods address.

To provide secure access tointernal and external cloud resources, eliminate split-tunnel traffic flows, and enable identity and access management capabilities, the most appropriate solutions are CASB (Cloud Access Security Broker) and SASE (Secure Access Service Edge).

Why CASB and SASE?

CASB (Cloud Access Security Broker):

Secure Access: CASB solutions provide secure access to cloud resources by enforcing security policies and monitoring user activities.

Identity and Access Management: CASBs integrate with identity and access management (IAM) systems to ensure that only authorized users can access cloud resources.

Visibility and Control: They offer visibility into cloud application usage and control over data sharing and access.

SASE (Secure Access Service Edge):

Eliminate Split-Tunnel Traffic: SASE integrates network security functions with WAN capabilities to ensure secure access without the need for split-tunnel configurations.

Comprehensive Security: SASE provides a holistic security approach, including secure web gateways, firewalls, and zero trust network access (ZTNA).

Identity-Based Access: SASE leverages IAM to enforce access controls based on user identity and context.

Other options, while useful, do not comprehensively address all the requirements:

A. Federation: Useful for identity management but does not eliminate split-tunnel traffic or provide comprehensive security.

B. Microsegmentation: Enhances security within the network but does not directly address secure access to cloud resources or split-tunnel traffic.

D. PAM (Privileged Access Management): Focuses on managing privileged accounts and does not provide comprehensive access control for internal and external resources.

E. SD-WAN: Enhances WAN performance but does not inherently provide the identity and access management capabilities or eliminate split-tunnel traffic.

The best action to address the requirement of accessing the historian server within a SCADA system is to isolate the historian server for connections only from the SCADAenvironment. Here’s why:

Security and Isolation: Isolating the historian server ensures that only authorized devices within the SCADA environment can connect to it. This minimizes the attack surface and protects sensitive data from unauthorized access.

Access Control: By restricting access to the historian server to only SCADA devices, the organization can better control and monitor interactions, ensuring that only legitimate queries and data retrievals occur.

Best Practices for Critical Infrastructure: Following the principle of least privilege, isolating critical components like the historian server is a standard practice in securing SCADA systems, reducing the risk of cyberattacks.

To develop a baseline of security configurations that will be automatically utilized when a machine is created, the security architect should deploy Ansible. Here’s why:

Automation: Ansible is an automation tool that allows for the configuration, management, and deployment of applications and systems. It ensures that security configurations are consistently applied across all new machines.

Scalability: Ansible can scale to manage thousands of machines, making it suitable for large enterprises that need to maintain consistent security configurations across their infrastructure.

Compliance: By using Ansible, organizations can enforce compliance with security policies and standards, ensuring that all systems are configured according to best practices.

The most cost-effective and secure solution is to configure VPN concentrators inside the OT networks at both sites (Option D). This setup allows encrypted communications between Site A and Site B, enabling controllers at either site to serve as secondary or failover devices for the other. By leveraging VPN tunnels, the organization avoids the expensive and time-consuming process of laying new fiber infrastructure, while still ensuring secure, authenticated, and encrypted connections across sites.

Option A, direct fiber connectivity, provides high performance but is extremely costly and less flexible than VPN solutions. Option B, deploying redundant SCADA controllers at each site, increases hardware, licensing, and management costs while still requiring interconnectivity. Option C, air-gapping the OT network, may improve isolation but would prevent remote failover capabilities, contradicting the requirement for cross-site control.

By implementing VPN concentrators, the organization achieves secure cross-site redundancy, supports operational continuity in case of controller outages, and does so in a cost-effective manner aligned with common OT security practices.

Geofencingallows the device to be restricted based on its physical location — disabling or locking devices when they move outside of trusted zones.Full disk encryptionensures that if a device is lost, the data remains inaccessible to unauthorized users. Containerization protects specific apps or data, but does not disable the entire device. Patch management, allow/blocklists, and geotagging serve other important functions but are not directly linked to the requirements in this scenario.