Important Cisco 300-745 SDSI Exam Questions

Answer: C

Explanation:

In the modern landscape of remote work, a legal services company must enforce acceptable use policies (AUP) regardless of where a corporate laptop is located. Cisco Umbrella is the ideal architectural solution for this requirement. Umbrella acts as a Secure Internet Gateway (SIG) that operates primarily at the DNS and web layer. When a remote employee attempts to access a personal email site or a social media platform, Umbrella intercepts the DNS request and checks it against the organization's defined security policy.

Cisco Umbrella provides granular Content Filtering capabilities, allowing administrators to block entire categories of websites, such as 'Social Networking' or 'Webmail,' with a single click. This enforcement happens at the edge---before a connection is even established to the malicious or unauthorized site---making it highly efficient for remote users who may not be connected to the corporate VPN. While Cisco TrustSec (Option A) and RADIUS (Option B) are powerful for internal network segmentation and authentication, they do not inherently provide the URL/domain-based categorization required to block specific web content for remote clients. A network monitoring tool (Option D) provides visibility but lacks the active enforcement mechanism to block traffic. Therefore, Cisco Umbrella is the specified technology in the SDSI objectives for cloud-delivered web security and policy enforcement for a distributed workforce.

========

Answer: A

Explanation:

In a modern cloud and campus environment, managing the lifecycle of an identity is the cornerstone of a secure architecture. Identity and Access Management (IAM) is the comprehensive framework of policies and technologies that ensures the right individuals have the appropriate access to technology resources. According to the Cisco SDSI objectives, IAM is the primary mechanism used to transition from manual, error-prone onboarding to a policy-driven approach based on roles and responsibilities.

IAM solutions allow administrators to define digital identities and associate them with specific roles (Role-Based Access Control). When a new employee is onboarded, the IAM system automatically provisions access to the necessary cloud applications and data based on their department or job function. This ensures the principle of least privilege is maintained from day one. While Security Groups (Option B) and Network Access Control Lists (ACLs) (Option D) are important technical controls for filtering traffic at the network layer, they do not manage the identity lifecycle or the complex mapping of users to application permissions. A VPN (Option C) provides a secure tunnel for remote access but does not define what a user can do once they are inside the network. IAM provides the central control plane for identity-centric security, which is essential for a large university environment with high user turnover and diverse access requirements.

========

Answer: D

Explanation:

In the context of the Cisco SDSI v1.0 blueprint, 'shifting left' refers to the practice of integrating security testing as early as possible in the Software Development Life Cycle (SDLC). The most effective component of the pipeline for running these early tests is Source Code Management (SCM). By integrating security tools directly into the SCM system (such as GitHub, GitLab, or Bitbucket), developers can identify vulnerabilities while the code is still being written or during the initial commit phase.

Techniques such as Static Application Security Testing (SAST) and secret scanning are typically triggered at the SCM level through pull requests or commit hooks. This allows the security team to identify flawed logic or hardcoded credentials before the code is ever compiled or moved to the build stage. While Continuous Deployment (Option A) handles the final release of the software, it is too late in the pipeline for a 'shift-left' approach to be most effective. Software Bill of Materials (SBOM) analysis (Option C) is a specific task focused on dependency management, and Cloud Security Posture Management (CSPM) (Option B) focuses on the runtime environment rather than the application code itself. Utilizing SCM as the primary checkpoint ensures that security becomes a foundational part of the development process, reducing the risk of vulnerable software reaching production environments.

========

Answer: D

Explanation:

According to the Cisco SDSI v1.0 objectives, Artificial Intelligence and Machine Learning (ML) provide significant benefits in automating the identification of complex security weaknesses. One of the primary benefits is the ability of AI to perform Encrypted Threat Analytics (ETA). AI models can analyze the metadata and initial handshake patterns of encrypted traffic---without needing to decrypt it---to identify vulnerabilities associated with weak TLS algorithms or outdated cipher suites.

By recognizing specific fingerprints in the TLS handshake, AI-driven tools can alert administrators to non-compliant encryption standards that might be susceptible to interception. While AI is a powerful force multiplier, it does not replace a comprehensive defense-in-depth strategy (Option B); rather, it enhances it. It does not directly speed up data transmission (Option A), as that is a function of hardware and bandwidth. Furthermore, while AI helps mitigate DDoS attacks, it rarely provides 'complete' protection (Option C) on its own, as DDoS mitigation requires a multi-layered approach involving massive bandwidth and specialized scrubbing. The ability to identify cryptographic weaknesses at scale is a core functional benefit of AI in modern security infrastructure, aligning with the Cisco goal of maintaining a hardened and compliant network posture through automated visibility.

Answer: C

Explanation:

In the aftermath of a security breach, forensic investigators rely on the Accounting portion of AAA (Authentication, Authorization, and Accounting) to reconstruct a timeline of events. While Authentication verifies identity and Authorization defines permissions, Accounting is the specific framework used to track user activity, including login/logout times and the specific commands executed during a session.

According to Cisco Security Infrastructure design objectives, implementing a centralized AAA solution (such as Cisco Identity Services Engine (ISE) or a TACACS+/RADIUS server) is critical for accountability. In this scenario, the engineer would query the AAA logs to identify exactly 'who' accessed the sales system during the compromise period. SNMP (Option A) is primarily for network monitoring and performance data, not granular user access logs. NACM (Option B) is an access control model for NETCONF but doesn't provide the broad auditing required here. PKI (Option D) provides the certificates used for digital signatures and encryption but does not log the historical 'session' data needed for the investigation. Therefore, AAA is the fundamental architectural requirement for ensuring non-repudiation and providing the audit trail necessary to satisfy risk management and incident response requirements.

========