312-50v13日本語対策、312-50v13模擬問題長年にわたり、ShikenPASSはずっとIT認定試験を受験する皆さんに最良かつ最も信頼できる参考資料を提供するために取り組んでいます。IT認定試験の出題範囲に対して、ShikenPASSは豊富な経験を持っています。また、ShikenPASSは数え切れない受験生を助け、皆さんの信頼と称賛を得ました。ですから、ShikenPASSの312-50v13問題集の品質を疑わないでください。これは間違いなくあなたが312-50v13認定試験に合格することを保証できる問題集です。ShikenPASSは試験に失敗すれば全額返金を保証します。このような保証があれば、ShikenPASSの312-50v13問題集を購入しようか購入するまいかと躊躇する必要は全くないです。この問題集をミスすればあなたの大きな損失ですよ。 ECCouncil Certified Ethical Hacker Exam (CEHv13) 認定 312-50v13 試験問題 (Q691-Q696):質問 # 691
Matthew, a black hat, has managed to open a meterpreter session to one of the kiosk machines in Evil Corp's lobby. He checks his current SID, which is:
S-1-5-21-1223352397-1872883824-861252104-501
What needs to happen before Matthew has full administrator access?
A. He must perform privilege escalation.
B. He already has admin privileges, as shown by the "501" at the end of the SID.
C. He needs to gain physical access.
D. He needs to disable antivirus protection.
正解：A
解説：
Comprehensive and Detailed Explanation:
In Windows SID structure:
* RID 500 = Default Administrator
* RID 501 = Guest Account
Therefore, "-501" at the end indicates Matthew is operating as the Guest user, which has very limited privileges. To gain full administrative control, he must escalate his privileges.
From CEH v13 Courseware:
* Module 6: System Hacking # Privilege Escalation Techniques
Reference:Microsoft Documentation - Security Identifiers (SIDs) and Well-Known RIDsCEH v13 Study Guide - Module 6: Windows User Privileges
質問 # 692
A major financial institution is experiencing persistent DoS attacks against online banking, disrupting transactions. Which sophisticated DoS technique poses the greatest challenge to detect and mitigate effectively, potentially jeopardizing service availability?
A. A coordinated UDP flood targeting authoritative DNS servers to disrupt domain resolution
B. A distributed SQL injection attack against online banking database servers causing resource exhaustion
C. A zero-day buffer overflow exploit against the web server causing service unavailability via RCE
D. A synchronized Layer 3 Smurf attack flooding routers with ICMP echo requests
正解：B
解説：
CEH emphasizes that application-layer DoS attacks are often the most difficult to detect and mitigate because they can mimic legitimate user behavior while exhausting backend resources. A distributed SQL injection-driven DoS (Option B) can be especially challenging: attackers send requests that appear valid at the HTTP level, but the injected or crafted parameters force the application/database to execute expensive queries (heavy joins, sleep/delay functions, or costly operations). When distributed across many sources, the traffic can look like normal customer usage-successful TCP handshakes, valid HTTP requests, and realistic user-agent patterns-while still causing database connection pool exhaustion, CPU spikes, lock contention, and degraded response times.
Option A (Smurf) and Option D (UDP/DNS flooding) are more volumetric/network-layer patterns and are typically mitigated with upstream DDoS scrubbing, rate limiting, and filtering, and are more readily detectable via traffic anomalies. Option C (zero-day RCE) is severe, but it is not primarily a "DoS technique" in CEH classification; it's an exploitation scenario that may lead to service outage, but the detection
/mitigation path centers on exploit prevention, EDR, patching, and containment rather than DoS controls. In CEH terms, Option B aligns best with a sophisticated, scenario-like DoS that blends into normal app activity.
CEH mitigation approaches for application-layer DoS include WAF rules, input validation/parameterization (preventing SQLi), query cost controls, rate limiting by behavior, caching, database hardening, and anomaly detection at the application and database tiers.
質問 # 693
What is the main security service a cryptographic hash provides?
A. Integrity and ease of computation
B. Integrity and collision resistance
C. Integrity and computational infeasibility
D. Message authentication and collision resistance
正解：B
解説：
Comprehensive and Detailed Explanation:
Cryptographic hash functions provide:
* Integrity: Any change in the input changes the output hash.
* Collision Resistance: It is computationally infeasible to find two inputs that produce the same hash.
This ensures data is not altered during transmission.
From CEH v13 Courseware:
* Module 10: Cryptography # Hashing Functions (e.g., SHA-256, MD5)
Reference:NIST SP 800-107 - "Cryptographic hash functions provide integrity by detecting changes in data via collision-resistant functions."
質問 # 694
What is the role of test automation in security testing?
A. Test automation is not usable in security due to the complexity of the tests.
B. It can accelerate benchmark tests and repeat them with a consistent test setup. But it cannot replace manual testing completely.
C. It should be used exclusively. Manual testing is outdated because of low speed and possible test setup inconsistencies.
D. It is an option but it tends to be very expensive.
正解：B
質問 # 695
Shellshock allowed an unauthorized user to gain access to a server. It affected many Internet-facing services, which OS did it not directly affect?
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