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人はそれぞれの夢を持っています。あなたの夢は何でしょうか。昇進ですか。あるいは高給ですか。私の夢はCompTIAのCAS-005認定試験に受かることです。この認証の証明書を持っていたら、全ての難問は解決できるようになりました。この試験に受かるのは難しいですが、大丈夫です。私はJpshikenのCompTIAのCAS-005試験トレーニング資料を選びましたから。私が自分の夢を実現することを助けられますから。あなたもITに関する夢を持っていたら、速くJpshikenのCompTIAのCAS-005試験トレーニング資料を選んでその夢を実現しましょう。Jpshikenは絶対信頼できるサイトです。
質問 # 416
A security officer received several complaints from users about excessive MFA push notifications at night. The security team investigates and suspects malicious activities regarding user account authentication. Which of the following is the best way for the security officer to restrict MFA notifications?
正解：C
解説：
Prompt-driven MFA means that MFA prompts are triggered only when there is suspicious activity or a specific need for authentication, rather than being sent regularly. This approach would reduce the excessive notifications while still ensuring security, addressing the user's complaints effectively.
質問 # 417
A vulnerability can on a web server identified the following:
Which of the following actions would most likely eliminate on path decryption attacks? (Select two).
正解：A、F
解説：
On-path decryption attacks, such as BEAST (Browser Exploit Against SSL/TLS) and other related vulnerabilities, often exploit weaknesses in the implementation of CBC (Cipher Block Chaining) mode. To mitigate these attacks, the following actions are recommended:
Removing support for CBC-based key exchange and signing algorithms: CBC mode is vulnerable to certain attacks like BEAST. By removing support for CBC-based ciphers, you can eliminate one of the primary vectors for these attacks. Instead, use modern cipher modes like GCM (Galois/Counter Mode) which offer better security properties.
Adding TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA256: This cipher suite uses Elliptic Curve Diffie-Hellman Ephemeral (ECDHE) for key exchange, which provides perfect forward secrecy. It also uses AES in GCM mode, which is not susceptible to the same attacks as CBC.
SHA-256 is a strong hash function that ensures data integrity.
質問 # 418
A security engineer receives an alert from the threat intelligence platform with the following information:
Which of the following actions should the security engineer do first?
正解：D
解説：
The first action should be to reset access for John and Joe, who are corporate accounts belonging to the organization. Their credentials were exposed in recent leaks, including one from an initial access broker (Joe), which indicates an active exploitation risk. Immediate password resets and session invalidations prevent adversaries from using the compromised credentials to gain access.
Ann's account (@hotmail.com) is personal and not under corporate management, so while her exposure is concerning, it does not pose a direct risk to organizational systems. Contacting her can follow later steps but should not delay urgent remediation for John and Joe.
Option B delays remediation. Option C overreaches by including Ann in corporate resets. Option D includes contacting authorities prematurely, which is important but secondary to immediate containment.
CAS-005 emphasizes rapid containment of credential leaks affecting corporate identities, making access resets for John and Joe the first step.
質問 # 419
After some employees were caught uploading data to online personal storage accounts, a company becomes concerned about data leaks related to sensitive, internal documentation. Which of the following would the company most likely do to decrease this type of risk?
正解：A
解説：
A Cloud Access Security Broker (CASB) is a security policy enforcement point placed between cloud service consumers and cloud service providers to combine and interject enterprise security policies as cloud-based resources are accessed. Implementing a CASB provides several benefits:
A: Improve firewall rules to avoid access to those platforms: This can help but is not as effective or comprehensive as a CASB.
B: Implement a cloud-access security broker: A CASB can provide visibility into cloud application usage, enforce data security policies, and protect against data leaks by monitoring and controlling access to cloud services. It also provides advanced features like data encryption, data loss prevention (DLP), and compliance monitoring.
C: Create SIEM rules to raise alerts for access to those platforms: This helps in monitoring but does not prevent data leaks.
D: Deploy an internet proxy that filters certain domains: This can block access to specific sites but lacks the granular control and visibility provided by a CASB.
Implementing a CASB is the most comprehensive solution to decrease the risk of data leaks by providing visibility, control, and enforcement of security policies for cloud services.
質問 # 420
A nation-state actor is exposed for attacking large corporations by establishing persistence in smaller companies that are likely to be acquired by these large corporations. The actor then provisions user accounts in the companies for use post-acquisition. Before an upcoming acquisition, a security officer conducts threat modeling with this attack vector. Which of the following practices is the best way to investigate this threat?
正解：B
解説：
Comparing all existing credentials to personnel and services is the best practice to investigate this threat. By reviewing and comparing the credentials used by employees and services within the company, the security officer can identify any unauthorized or suspicious accounts, including those provisioned by the nation-state actor for post-acquisition persistence.
This step helps identify and mitigate the risk of malicious accounts being established before the acquisition takes place.
質問 # 421
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