Important Cisco 300-745 SDSI Exam Questions

Answer: D

Explanation:

In the architecture of a modern secure infrastructure, achieving least privilege is a foundational requirement, especially for a financial institution where data sensitivity is high. Role-Based Access Control (RBAC) is the specific methodology used to restrict network access based on the roles of individual users within an enterprise. By implementing RBAC, the security team can ensure that employees only have access to the specific network segments and resources necessary for their job functions, effectively minimizing the internal attack surface.

Within the Cisco Security ecosystem, RBAC is often operationalized through tools like Cisco Identity Services Engine (ISE) using Scalable Group Tags (SGTs). Instead of relying on static IP addresses or complex Access Control Lists (ACLs) that are difficult to maintain across different segments, RBAC allows for dynamic policy enforcement. For example, a 'Financial Auditor' role would automatically be granted access to the accounting segment but blocked from the development segment, regardless of where they plug into the network. While PKI (Option C) provides strong authentication and encryption, and NetFlow (Option A) provides visibility, neither inherently defines the 'least privilege' permission structure. RBAC is the architectural approach that directly maps business requirements to technical access policies, ensuring that security is maintained across segmented environments as required by the Cisco SDSI objectives for secure infrastructure design.

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Answer: D

Explanation:

In a smart factory environment, IoT devices often use specialized industrial protocols (like Modbus, PROFINET, or EtherNet/IP) and have limited built-in security. To meet the requirements of protecting these devices from network-based attacks while gaining visibility into communication patterns and detecting anomalies, an IPS/IDS (Intrusion Prevention/Detection System) is the most effective solution.

Modern Cisco Secure Firewall (NGFW) systems integrate advanced IPS/IDS capabilities that go beyond simple port-based filtering. They provide deep packet inspection (DPI) to identify specific IoT protocols and baseline 'normal' behavior. When an IoT device suddenly begins communicating with an unknown external IP or attempts to use a command it has never used before, the IPS/IDS can trigger an alert or block the traffic as an anomaly.

While a Zone-Based Firewall (Option A) or a Traditional Firewall (Option C) can segment traffic and control access between zones, they generally lack the granular visibility and behavior-based anomaly detection required for IoT security. A Transparent Firewall (Option B) is a deployment mode that makes the firewall 'invisible' at Layer 2, which is useful for insertion into existing networks but does not inherently provide the required anomaly detection. Therefore, IPS/IDS is the primary technology within the Cisco Security Infrastructure that addresses the need for signature-based protection combined with behavioral visibility for specialized IoT traffic.

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Answer: B

Explanation:

The requirement to restrict administrative tasks like 'customer onboarding' to specific users based on their job function is a classic use case for Role-Based Access Control (RBAC). In the context of application security design, RBAC is the mechanism that maps a user's identity to a specific set of permissions within the application.

According to Cisco Security Infrastructure principles, RBAC ensures the principle of least privilege by ensuring that an 'Admin' role has access to onboarding functions, while a 'Support' or 'Standard User' role does not. This control is independent of the network layer and is enforced at the application or identity provider level. While a VPC (Option A) or Security Groups (Option C) provide network-layer isolation and can ensure the user is on the corporate network (by filtering IP ranges), they cannot distinguish between different functions or actions performed within the application once the connection is established. A Service Mesh (Option D) is used for microservices communication and can provide some authorization, but RBAC is the primary architectural approach for defining 'who can do what' within an application interface. Implementing RBAC allows the SaaS provider to secure sensitive administrative workflows, ensuring that only authorized personnel can modify customer data or system configurations.

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Answer: A

Explanation:

In the framework of the Designing Cisco Security Infrastructure (300-745 SDSI) curriculum, the 'Shift-Left' security strategy is fundamental to modern DevSecOps. To identify vulnerabilities like SQL injection at the earliest possible stage---specifically before the code is even compiled or deployed---Static Application Security Testing (SAST) is the required solution. SAST tools analyze the application's source code, byte code, or binaries without actually executing the program.

By integrating SAST tools like Checkmarx or SonarQube into the CI/CD pipeline, the security team can automate the scanning of every code commit or pull request. These tools use sophisticated algorithms to trace data flows and identify dangerous patterns, such as user-controlled input being concatenated directly into SQL queries without proper sanitization or parameterization. This proactive approach allows developers to receive immediate feedback within their native workflow, enabling them to fix security flaws before they progress into later, more expensive stages of the development lifecycle.

In contrast, Dynamic Application Security Testing (DAST) (Option D) requires a running instance of the application and typically occurs much later in the pipeline, such as during the testing or staging phase. While DAST is excellent for finding runtime vulnerabilities, it does not meet the requirement of identifying issues 'early in the development process' as effectively as SAST. Build log observability tools (Option B) and workflow automation platforms (Option C) provide infrastructure and visibility but do not possess the specialized engine required to perform deep code analysis for application-layer vulnerabilities like SQL injection. Implementing SAST ensures that security is a foundational element of the code-writing phase, aligning with Cisco's vision for a secure, automated software supply chain.

Answer: A

Explanation:

The Cisco Secure Client (formerly AnyConnect) is the comprehensive solution designed to handle the complexities of a hybrid workforce. To meet the company's requirements, Secure Client provides a secure VPN tunnel (SSL or IPsec) that ensures all traffic between the remote laptop and corporate resources is encrypted and authenticated.

Critically, for the scenario where a laptop is stolen, Secure Client integrates with various endpoint security modules. While it primarily handles secure connectivity, it is the platform that hosts features like Always-On VPN and management of disk encryption status. According to Cisco Security Infrastructure design principles, Secure Client acts as the unified agent on the endpoint that maintains the security posture and connectivity regardless of the user's location.

While Cisco Duo (Option B) provides essential Multi-Factor Authentication (MFA) to verify the user's identity, it does not provide the encrypted tunnel for data transit. ISE Posture (Option C) is a feature (often delivered via Secure Client) that checks the health of the device but doesn't provide the connectivity itself. Umbrella (Option D) protects the user from malicious sites and provides a roaming client for DNS/web security, but it does not replace the requirement for a secure tunnel to private corporate resources. Therefore, Secure Client is the holistic solution that bridges the gap between the remote user and the corporate data center while ensuring that the device remains under the organization's security umbrella.