Nokia 4A0-255 Exam Prep Course (Premium File)
AI-Powered Nokia Advanced Optical Network Design Exam - Pass on Your First Try

Question 245:

• Correct answer: D.

• Explanation:

• Key concept: Replacing ECC with lattice-based crypto is about ensuring security against quantum adversaries and future-proofing cryptographic agility, not about traditional classical performance or other features.

Question 211:

• Answer: C — The codebase lacks traceability to functional and non-functional requirements.

• Why this supports formal methods: Formal methods use rigorous, mathematically-based verification to prove that software meets its specified goals. If the codebase cannot be traced back to its functional and non-functional requirements, there’s no solid ground to apply formal proofs or verification. Traceability ensures each component, requirement, and test can be linked and verified, which is essential for formal verification efforts in safety-critical avionics.

• Why the other options are less direct:

• Takeaway: In safety-critical systems, aligning code with explicit requirements via traceability is a prerequisite for applying formal methods effectively. This helps establish verifiable correctness and safety properties.

Question 206:
Answer: STRIDE

• STRIDE is a threat-modeling framework that organizes threats into six categories: Spoofing, Tampering, Repudiation, Information Disclosure, Denial of Service, and Elevation of Privilege.
• The CISO’s concerns map directly to STRIDE:

• Why not the others:

Question 192:

• Answer: B — The samples were probably written by the same developer.

• Why this is correct:

• Why the other options are less likely:

Cannot open my exm file

Question 8:

• Answer: No. The solution does not meet the goal.

• Why:

• What to configure instead:

• Key concept: ILB health probes must align with the service being load-balanced. SQL Server endpoints require TCP checks, not HTTP checks.

Question 108:

• Correct answer: A

• Why: A flat internal cloud network means all hosts can reach each other and any public-facing storage may be exposed. Implementing segmentation with ACLs restricts which networks/hosts can access sensitive file storage, reducing exposure and limiting blast radius.

• Why not the others:

Question 82:
I can’t view the [Image] in Log entries. If you paste the text of Log entry 1–4 or describe the payloads, I can identify which shows the exploitation.
In general, for a zero-day command injection, look for:

• Log entries showing input that appears to be passed to a shell or OS command (e.g., attempts to execute ls, whoami, uname -a, or wget/curl from a web input).
• Use of command metacharacters in user input (e.g., ;, &, |, $(), ${...}, backticks).
• HTTP requests with suspicious query strings or POST bodies that include shell-like commands or encoded payloads.
• Unexpected process creation or web server issuing OS commands (e.g., new /bin/sh or cmd.exe spawned).

• Compare entries for evidence of command execution originating from user input.
• Check for anomalies that shouldn’t be possible from normal traffic (rare file writes, new executables, or outbound connections triggered by web input).
• Correlate with timing and any known vulnerability active window.

Question 12:
Correct answer: D. Exploitation

• In the Cyber Kill Chain, the stages are:

• In this scenario, the attacker gained access to the internal network via social engineering. Since they have already turned the vector into access, they are at the Exploitation stage.

• Why not the others:

Question 3:

• Answer: C: Configure an Access-Control-Allow-Origin header to authorized domains.

• Set an HttpOnly flag to force communication by HTTPS: HttpOnly affects cookie ??????? via client-side scripts, not transport security. HTTPS enforcement is done with TLS, not HttpOnly.
• Block requests without an X-Frame-Options header: X-Frame-Options mitigates clickjacking, not cross-origin data access.
• Disable the cross-origin resource sharing header: This would remove restrictions and increase exposure; you should restrict origins, not disable CORS.