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質問 # 42
An application has authenticated to Vault and has obtained dynamic database credentials with a lease of 4 hours. Four hours later, the credentials expire, and the application can no longer communicate with the backend database, so the application goes down. What should the developers instruct the application to do to prevent this from happening again while maintaining the same level of security?
正解：B
解説：
Comprehensive and Detailed in Depth Explanation:
To prevent application downtime due to expired dynamic credentials while maintaining security, the application should renew the lease before it expires. The HashiCorp Vault documentation states: "The application should frequently 'check-in' with Vault and renew the lease to prevent the lease from expiring." It adds: "A lease must be renewed before it has expired. Once it has expired, it is permanently revoked and a new secret must be requested." The docs elaborate: "Dynamic secrets are designed to be short-lived and automatically rotated or revoked when their lease expires. Renewing the lease extends its validity, ensuring continuous access without compromising the security benefits of short-lived credentials."A (Static credentials)reduces security by eliminating rotation.C (Revoke)ends access early.D (Different auth method)doesn't address lease management. Thus, B is correct.
Reference:
HashiCorp Vault Documentation - Leases: Lease Renew and Revoke
質問 # 43
After encrypting data using the Transit secrets engine, you've received the following output. Which of the following is true based on the output displayed below?
Key: ciphertext Value: vault:v2:
45f9zW6cglbrzCjI0yCyC6DBYtSBSxnMgUn9B5aHcGEit71xefPEmmjMbrk3
正解：B
解説：
Comprehensive and Detailed in Depth Explanation:
* A:v2 shows the key was rotated once. Correct.
* B:Transit doesn't store data. Incorrect.
* C:v2 is the key version, not data version. Incorrect.
* D:No transit v2 option exists. Incorrect.
Overall Explanation from Vault Docs:
"Ciphertext is prepended with the key version (e.g., v2)... Indicates rotation." Reference:https://developer.hashicorp.com/vault/tutorials/encryption-as-a-service/eaas-transit#rotate-the- encryption-key
質問 # 44
Your organization is integrating its legacy application with Vault to improve its security. However, you have discovered that the application has issues when the token changes for authentication during testing. What type of token could be used to help alleviate this issue without compromising security?
正解：B
解説：
Comprehensive and Detailed In-Depth Explanation:
Periodic Service Tokens allow renewal without changing the token, addressing the application's issue. The Vault documentation states:
"In some cases, having a token be revoked would be problematic -- for instance, if a long-running service needs to maintain its SQL connection pool over a long period of time. In this scenario, a periodic token can be used. The idea behind periodic tokens is that it is easy for systems and services to perform an action relatively frequently -- for instance, every two hours, or even every five minutes. Therefore, as long as a system is actively renewing this token -- in other words, as long as the system is alive -- the system is allowed to keep using the token and any associated leases."
-Vault Concepts: Tokens
* A: Correct. Periodic tokens maintain stability with renewal:
"A Periodic Service Token is a type of token in Vault that can be renewed periodically without the need for the application to re-authenticate every time the token changes."
-Vault Concepts: Tokens
* B: Root tokens are insecure for applications due to unlimited access:
"Root tokens should not be used for application authentication due to their high level of access and security risks."
-Vault Concepts: Tokens
* C: Orphan tokens don't support periodic renewal inherently.
* D: Batch tokens cannot be renewed:
"Batch tokens cannot be renewed."
-Vault Tutorials: Batch Tokens
References:
Vault Concepts: Tokens
質問 # 45
True or False? The following policy permits a user to read secrets contained in the path secrets/cloud/apps
/jenkins?
text
CollapseWrapCopy
path "secrets/cloud/apps/jenkins/*" {
capabilities = ["create", "read", "update", "delete", "list"]
}
正解：A
解説：
Comprehensive and Detailed In-Depth Explanation:
The policy's path syntax determines access:
* B. False: "This policy will NOT permit access to secrets stored under secrets/cloud/apps/jenkins." The wildcard * applies to pathsafterjenkins/, e.g., secrets/cloud/apps/jenkins/config, but not the exact path secrets/cloud/apps/jenkins. "Notice that in the policy, the wildcard (*) is AFTER the path jenkins, and not AT the jenkins path."
* Incorrect Option:
* A. True: Incorrect; the policy requires an additional segment to match.
To permit secrets/cloud/apps/jenkins, the policy should be path "secrets/cloud/apps/jenkins" {} or include a broader wildcard like secrets/cloud/apps/*.
Reference:https://developer.hashicorp.com/vault/docs/concepts/policies
質問 # 46
Beyond encryption and decryption of data, which of the following is not a function of the Transit secrets engine?
正解：D
解説：
Comprehensive and Detailed in Depth Explanation:
The Transit secrets engine focuses on cryptographic operations, not storage. The HashiCorp Vault documentation states: "The transit secrets engine handles cryptographic functions on data in-transit. Vault doesn't store the data sent to the secrets engine. It can also be viewed as 'cryptography as a service' or
'encryption as a service'. The transit secrets engine can also sign and verify data; generate hashes and HMACs of data; and act as a source of random bytes." It emphasizes: "Vault does not store the data sent to the secrets engine," makingstore the encrypted data (C) incorrect.Generate hashes/HMACs (A),sign/verify (B), andrandom bytes (D)are all supported functions.
Thus, C is correct.
Reference:
HashiCorp Vault Documentation - Transit Secrets Engine
質問 # 47
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