[2026年08月]更新のHCVA0-003試験問題集合格させるのは2026年最新のHashiCorp Certified: Vault Associate (003)Exam
無料で使えるHCVA0-003試験問題集で合格させるお手軽に試験合格
HashiCorp HCVA0-003 認定試験の出題範囲：
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質問 # 194
A user issues the following cURL command to encrypt data using the transit engine and the Vault AP:
Which payload.json file has the correct contents?
- A. A white background with black text AI-generated content may be incorrect.
- B. A computer code with black text AI-generated content may be incorrect.
- C. A white background with black text AI-generated content may be incorrect.
- D. A white background with black text AI-generated content may be incorrect.
正解：D
解説：
The payload.json file that has the correct contents is C. This file contains a JSON object with a single key,
"plaintext", and a value that is the base64-encoded string of the data to be encrypted. This is the format that the Vault API expects for the transit encrypt endpoint1. The other files are not correct because they either have the wrong key name, the wrong value format, or the wrong JSON syntax.
:
Encrypt Data - Transit Secrets Engine | Vault | HashiCorp Developer
質問 # 195
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"]
}
- A. True
- B. False
正解：B
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 # 196
In regards to the Transit secrets engine, which of the following is true given the following command and output (select three):
$ vault write encryption/encrypt/creditcard plaintext=$(base64 <<< "1234 5678 9101 1121") Key: ciphertext Value: vault:v3:cZNHVx+sxdMErXRSuDa1q
/pz49fXTn1PScKfhf+PIZPvy8xKfkytpwKcbC0fF2U=
- A. There are at least three data keys associated with this keyring
- B. The name of the keyring used to encrypt the data is creditcard
- C. The data was written to the encryption path, which is provided by default when enabling the Transit secrets engine
- D. The Transit secrets engine is mounted at the encryption path
正解：A、B、D
解説：
Comprehensive and Detailed in Depth Explanation:
* A:The command uses encryption/encrypt/creditcard, indicating the Transit engine is mounted at encryption/. Correct.
* B:The endpoint creditcard specifies the key name used for encryption. Correct.
* C:The output vault:v3: shows key version 3, implying at least three versions (v1, v2, v3) after rotations.
Correct.
* D:The default path for Transit is transit/, not encryption/. This is a custom mount, not default. Incorrect.
Overall Explanation from Vault Docs:
"The Transit engine encrypts data at a specified key name... Key versions (e.g., v3) indicate rotations." Reference:https://developer.hashicorp.com/vault/docs/secrets/transit
質問 # 197
Which of the following actions can be performed if you only had access to a token's accessor? (Select four)
- A. Look up a token's properties
- B. Look up a token's capabilities on a path
- C. Retrieve the actual token ID
- D. Revoke the token
- E. Renew the token
正解：A、B、D、E
解説：
Comprehensive and Detailed In-Depth Explanation:
A token accessor allows:
* A, B, D, E: "This accessor can only be used to perform limited actions: Look up a token's properties, Look up a token's capabilities on a path, Renew the token, Revoke the token." The calling token needs permissions.
* Incorrect Option:
* C: "Not including the actual token ID."
Reference:https://developer.hashicorp.com/vault/docs/concepts/tokens#token-accessors
質問 # 198
You are enabling a secrets engine in Vault using the CLI. What subcommands are available when using the vault secrets command? (Select five)
- A. migrate
- B. list
- C. tune
- D. move
- E. enable
- F. update
- G. disable
正解：B、C、D、E、G
解説：
Comprehensive and Detailed In-Depth Explanation:
The vault secrets command supports:
* C. tune: "Tune a secrets engine configuration."
* D. enable: "Enable a secrets engine."
* E. move: "Move a secrets engine to a new path."
* F. disable: "Disable a secrets engine."
* G. list: "List enabled secrets engines."
* Incorrect Options:
* A. update: Not a subcommand.
* B. migrate: Not applicable here.
"The vault secrets command has several subcommands to use when working with secrets engines." Reference:https://developer.hashicorp.com/vault/docs/commands/secrets#usage
質問 # 199
After creating a dynamic credential on a database, the DBA accidentally deletes the credentials on the database itself. When attempting to remove the lease, Vault returns an error stating that the credential cannot be found. What command can be run to make Vault remove the secret?
- A. vault lease revoke -enforce
- B. vault lease revoke -force -prefix < lease_path >
- C. vault revoke -apply
- D. vault lease -renew
正解：B
解説：
Comprehensive and Detailed in Depth Explanation:
When a dynamic credential is deleted externally, Vault may fail to revoke the lease due to the missing backend secret. The HashiCorp Vault documentation states: " The -force flag is meant for recovery situations where the secret in the target platform was manually removed. " The command vault lease revoke -force - prefix < lease_path > allows Vault to forcibly revoke all leases under the specified prefix, bypassing the error.
The docs elaborate: " Using -force with -prefix will revoke all leases that match the given prefix, even if the underlying secrets cannot be found or revoked on the target system. This is useful for cleaning up Vault's lease table when external changes disrupt normal revocation. " Here, < lease_path > would be the path like database/creds/role/. B (vault lease -renew) renews leases, not removes them. C (-enforce) is not a valid flag.
D (vault revoke -apply) is incorrect syntax. Thus, A is correct.
Reference:
HashiCorp Vault Documentation - Lease Revoke Command: Force
質問 # 200
You have deployed an application that needs to encrypt data before writing to a database. What secrets engine should you use?
- A. SSH
- B. TOTP
- C. PKI
- D. Transit
正解：D
解説：
Comprehensive and Detailed in Depth Explanation:
For encrypting data before writing it to a database, theTransitsecrets engine is the appropriate choice. The HashiCorp Vault documentation describes it as handling "cryptographic functions on data in-transit" and notes that it "can be viewed as 'cryptography as a service' or 'encryption as a service.'" It is designed to encrypt data without storing it, making it ideal for applications needing to secure data before storage in an external database. The primary use case is "to encrypt data from applications while still storing that encrypted data in some primary data store." TheSSHsecrets engine manages SSH keys and authentication, not data encryption. ThePKIsecrets engine handles certificate management, not general data encryption. TheTOTPsecrets engine generates time-based one-time passwords, unrelated to data encryption. Thus, Transit is the correct choice.
Reference:
HashiCorp Vault Documentation - Transit Secrets Engine
質問 # 201
Your application cannot manage authentication with Vault, but it can communicate with a local service to retrieve secrets. What solution can enable your app to generate dynamic credentials from Vault?
- A. Vault Agent with environment variable secret injection
- B. Vault Agent with the templating feature configured
- C. Vault Proxy with caching feature enabled
- D. Vault Proxy with Auto-Auth feature enabled
正解：D
解説：
Comprehensive and Detailed in Depth Explanation:
For an application that cannot manage authentication with Vault but can communicate with a local service, the Vault Proxy with Auto-Auth feature enabledis the optimal solution. The HashiCorp Vault documentation states that Vault Proxy can "act as a proxy between Vault and the application, optionally simplifying the authentication process." The Auto-Auth feature allows the proxy to handle authentication on behalf of the application, enabling it to generate dynamic credentials without the application needing to manage the authentication process directly. This aligns perfectly with the requirement of delegating authentication to a local service.
Vault Proxy with cachingimproves performance by caching responses but does not inherently handle authentication, missing the core need.Vault Agent with environment variable secret injectioninjects secrets into the application's environment but assumes the agent manages authentication, which the application cannot do.Vault Agent with templatinggenerates credentials based on templates but still requires authentication management, which the application cannot handle. Vault Proxy with Auto-Auth uniquely addresses this by offloading authentication responsibilities.
Reference:
HashiCorp Vault Documentation - Vault Agent and Proxy
質問 # 202
What is the default maximum time-to-live (TTL) for a token, measured in days?
- A. 14 days (336 hours)
- B. 31 days (744 hours)
- C. 32 days (768 hours)
- D. 7 days (168 hours)
正解：C
解説：
Comprehensive and Detailed in Depth Explanation:
* A:Vault's default max TTL is 768 hours (32 days). Correct.
* B, C, D:Incorrect values per Vault's defaults.
Overall Explanation from Vault Docs:
"The system max TTL is 768 hours (32 days) unless overridden..."
Reference:https://developer.hashicorp.com/vault/docs/concepts/tokens#token-time-to-live-periodic-tokens- and-explicit-max-ttls
質問 # 203
True or False? The command vault lease revoke -prefix aws/ will revoke all leases associated with the secret engine mounted at /aws.
- A. True
- B. False
正解：A
解説：
Comprehensive and Detailed in Depth Explanation:
The statement is True . The vault lease revoke -prefix aws/ command revokes all leases under the specified prefix. The HashiCorp Vault documentation states: " The vault lease revoke command is used to revoke leases. Using the -prefix flag allows you to revoke entire trees of secrets. " When applied to aws/, it targets all leases associated with the secrets engine mounted at that path.
The docs further explain under " Prefix-Based Revocation " : " The -prefix option allows revocation of all leases that share a common prefix, effectively cleaning up all secrets under a mount point or path. " Thus, A (True) is correct.
Reference:
HashiCorp Vault Documentation - Leases: Prefix-Based Revocation
質問 # 204
You want to encrypt a credit card number using the Transit secrets engine. You enter the following command and receive an error. What can you do to ensure that the credit card number is properly encrypted and the ciphertext is returned?
$ vault write -format=json transit/encrypt/creditcards plaintext="1234 5678 9101 1121" Error: * illegal base64 data at input byte 4
- A. The token used to issue the encryption request does not have the appropriate permissions
- B. Credit card numbers are not supported using the Transit secrets engine since it is considered sensitive data
- C. The plain text data needs to be encoded to base64
- D. The credit card number should not include spaces
正解：C
解説：
Comprehensive and Detailed in Depth Explanation:
The error indicates a problem with the plaintext input format. Let's analyze:
* A:The Transit engine requires plaintext to be base64-encoded for safe transport, as it may include non- text data. The error illegal base64 data occurs because "1234 5678 9101 1121" isn't base64-encoded.
Correct: use plaintext=$(base64 <<< "1234 5678 9101 1121").
* B:Permission errors would return a 403, not a base64 error. Incorrect.
* C:Transit supports encrypting sensitive data like credit card numbers. Incorrect.
* D:Spaces aren't the issue; the format must be base64. Incorrect.
Overall Explanation from Vault Docs:
"When you send data to Vault for encryption, it must be base64-encoded plaintext... This ensures safe transport of binary or text data." Reference:https://developer.hashicorp.com/vault/docs/secrets/transit#usage
質問 # 205
What is the proper command to enable the AWS secrets engine at the default path?
- A. vault enable secrets aws
- B. vault enable aws secrets engine
- C. vault secrets aws enable
- D. vault secrets enable aws
正解：D
解説：
Comprehensive and Detailed in Depth Explanation:
Enabling a secrets engine in Vault follows a specific syntax:
* A:Incorrect syntax; jumbled order.
* B:Correct: vault secrets enable <type> enables the AWS engine at aws/. Correct.
* C:Incorrect word order.
* D:Incorrect syntax.
Overall Explanation from Vault Docs:
"The command vault secrets enable <type> enables a secrets engine at its default path (e.g., aws/ for AWS)." Reference:https://developer.hashicorp.com/vault/docs/commands/secrets
質問 # 206
Tommy has written an AWS Lambda function that will perform certain tasks for the organization when data has been uploaded to an S3 bucket. Security policies for the organization do not allow Tommy to hardcode any type of credential within the Lambda code or environment variables. However, Tommy needs to retrieve a credential from Vault to write data to an on-premises database. What auth method should Tommy use in Vault to meet the requirements while not violating security policies?
- A. Userpass
- B. AppRole
- C. Token
- D. AWS
正解：D
解説：
Comprehensive and Detailed in Depth Explanation:
* A:AWS auth uses IAM roles, avoiding hardcoded credentials. Correct for Lambda.
* B:Userpass requires username/password, violating policy. Incorrect.
* C:Token requires a pre-generated token, often hardcoded. Incorrect.
* D:AppRole needs RoleID/SecretID, typically hardcoded. Incorrect.
Overall Explanation from Vault Docs:
"The AWS auth method provides an automated mechanism to retrieve a Vault token for IAM principals... no manual credential provisioning required." Reference:https://developer.hashicorp.com/vault/docs/auth/aws#aws-auth-method
質問 # 207
An organization wants to authenticate an AWS EC2 virtual machine with Vault to access a dynamic database secret. The only authentication method which they can use in this case is AWS.
- A. True
- B. False
正解：B
解説：
The statement is false. An organization can authenticate an AWS EC2 virtual machine with Vault to access a dynamic database secret using more than one authentication method. The AWS auth method is one of the options, but not the only one. The AWS auth method supports two types of authentication: ec2 and iam. The ec2 type uses the signed EC2 instance identity document to authenticate the EC2 instance. The iam type uses the AWS Signature v4 algorithm to sign a request to the sts:GetCallerIdentity API and authenticate the IAM principal. However, the organization can also use other auth methods that are compatible with EC2 instances, such as AppRole, JWT/OIDC, or Kubernetes. These methods require the EC2 instance to have some sort of identity material, such as a role ID, a secret ID, a JWT token, or a service account token, that can be used to authenticate to Vault. The identity material can be provisioned to the EC2 instance using various mechanisms, such as user data, metadata service, or cloud-init scripts. The choice of the auth method depends on the use case, the security requirements, and the trade-offs between convenience and control. References: AWS - Auth Methods | Vault | HashiCorp Developer , AppRole - Auth Methods | Vault | HashiCorp Developer
, JWT/OIDC - Auth Methods | Vault | HashiCorp Developer , Kubernetes - Auth Methods | Vault | HashiCorp Developer
質問 # 208
You need to decrypt customer data to provide it to an application. When you run the decryption command, you get the output below. Why does the response not directly reveal the cleartext data?
$ vault write transit/decrypt/phone_number ciphertext="vault:v1:tgx2vsxtlQRfyLSKvem..." Key Value
--- -----
plaintext aGFzaGljb3JwIGNlcnRpZmllZDogdmF1bHQgYXNzb2NpYXRl
- A. The user does not have permission to view the cleartext data
- B. The original data must have been encrypted
- C. The output is base64 encoded
- D. The output is actually a response wrapped token that needs to be unwrapped
正解：C
解説：
Comprehensive and Detailed In-Depth Explanation:
The Vault Transit secrets engine returns decrypted data inbase64-encoded format:
* B. The output is base64 encoded: "All plaintext data must be base64-encoded before being encrypted by Vault. As a result, decrypted data is always base64 encoded." Users must decode it (e.g., using base64 -d) to see cleartext.
* Incorrect Options:
* A. Permission Issue: Permissions would cause an error, not encoded output. "Not because the user lacks permission."
* C. Wrapped Token: The output is plaintext, not a token. "Not a response wrapped token."
* D. Original Encryption: Irrelevant; the issue is encoding, not encryption state.
This encoding ensures safe transmission of binary data.
Reference:https://developer.hashicorp.com/vault/docs/secrets/transit#usage
質問 # 209
Which command implements the AppRole authentication method?
- A. vault enable approle
- B. vault mount approle
- C. vault mount enable approle
- D. vault auth enable approle
正解：D
質問 # 210
Where do you define the Namespace to log into using the Vault Ul?
To answer this question
Use your mouse to click on the screenshot in the location described above. An arrow indicator will mark where you have clicked. Click the "Answer" button once you have positioned the arrow to answer the question. You may need to scroll down to see the entire screenshot.
正解：
解説：
Explanation:
The namespace can be defined in the "Mount path" field in the "Advanced options" section of the login screen. The mount path is the path where the auth method is enabled, and it can include a namespace prefix.
For example, if the LDAP auth method is enabled at the path ns1/auth/ldap, where ns1 is the namespace, then the mount path field should be set to ns1/auth/ldap. This way, the Vault UI will log in to the correct namespace and auth method. Alternatively, the namespace can also be specified in the URL of the Vault UI, such as https://vault.example.com/ui/vault/auth/ns1/auth/ldap/login.
質問 # 211
You want to integrate a third-party application to retrieve credentials from the HashiCorp Vault API. How can you accomplish this without having direct access to the source code?
- A. Put in a request to the third-party application vendor
- B. Instead of the API, have the application use the Vault CLI to retrieve credentials
- C. You cannot integrate a third-party application with Vault without being able to modify the source code
- D. Use the Vault Agent to obtain secrets and provide them to the application
正解：D
解説：
Comprehensive and Detailed in Depth Explanation:
Integrating a third-party application with Vault without modifying its source code requires a solution that handles authentication and secret retrieval externally, then delivers secrets in a way the application can consume (e.g., files or environment variables). Let's break this down:
* Option A: You cannot integrate a third-party application with Vault without being able to modify the source codeThis is overly restrictive and incorrect. Vault provides tools like the Vault Agent, which can authenticate and fetch secrets on behalf of an application without requiring code changes.
The agent can render secrets into a format (e.g., a file) that the application reads naturally. This option ignores Vault's flexibility for such scenarios. Incorrect.
* Option B: Put in a request to the third-party application vendorWhile this might eventually lead to native Vault support, it's impractical, slow, and depends on the vendor's willingness and timeline. It doesn't address the immediate need to integrate without source code access. This is a passive approach, not a technical solution within Vault's capabilities. Incorrect.
* Option C: Instead of the API, have the application use the Vault CLI to retrieve credentialsThe Vault CLI is designed for human operators or scripts, not seamless application integration. Third-party applications without source code modification can't invoke the CLIprogrammatically unless they're scripted to do so, which still requires external orchestration and isn't a clean solution. This approach is clunky, error-prone, and not suited for real-time secret retrieval in production. Incorrect.
* Option D: Use the Vault Agent to obtain secrets and provide them to the applicationThe Vault Agent is a lightweight daemon that authenticates to Vault, retrieves secrets, and renders them into a consumable format (e.g., a file or environment variables) for the application. For example, if the application reads a config file, the agent can write secrets into that file using a template. This requires no changes to the application's code-just configuration of the agent and the application's environment.
It's a standard, scalable solution for such use cases. Correct.
Detailed Mechanics:
The Vault Agent operates in two modes:authentication(to obtain a token) andsecret rendering(via templates). For a third-party app, you'd configure the agent with an auth method (e.g., AppRole), a template (e.g., {{ with secret "secret/data/my-secret" }}{{ .Data.data.key }}{{ end }}), and a sink (e.g., /path/to/app
/config). The agent runs alongside the app (e.g., as a sidecar in Kubernetes or a daemon on a VM), polls Vault for updates, and refreshes secrets as needed. The app remains oblivious to Vault, reading secrets as if they were static configs. This decoupling is key to integrating unmodified applications.
Real-World Example:
Imagine a legacy app that reads an API key from /etc/app/key.txt. The Vault Agent authenticates with Vault, fetches the key from secret/data/api, and writes it to /etc/app/key.txt. The app starts, reads the file, and operates normally-no code changes required.
Overall Explanation from Vault Docs:
"Vault Agent... provides a simpler way for applications to integrate with Vault without requiring changes to application code... It renders templates containing secrets required by your application." This is ideal for third-party or legacy apps where source code access is unavailable.
Reference:https://developer.hashicorp.com/vault/docs/agent-and-proxy/agent
質問 # 212
Which of the following statements are true about Vault policies? Choose two correct answers.
- A. The default policy can not be modified
- B. Policies deny by default (empty policy grants no permission)
- C. Policies provide a declarative way to grant or forbid access to certain paths and operations in Vault
- D. Vault must be restarted in order for a policy change to take an effect
- E. You must use YAML to define policies
正解：B、C
解説：
Vault policies are written in HCL or JSON format and are attached to tokens or roles by name. Policies define the permissions and restrictions for accessing and performing operations on certain paths and secrets in Vault. Policies are deny by default, which means that an empty policy grants no permission in the system, and any request that is not explicitly allowed by a policy is implicitly denied 1 . Some of the features and benefits of Vault policies are:
* Policies are path-based, which means that they match the request path to a set of rules that specify the allowed or denied capabilities, such as create, read, update, delete, list, sudo, etc 2 .
* Policies are additive, which means that if a token or a role has multiple policies attached, the effective policy is the union of all the individual policies. The most permissive capability is granted if there is a conflict 3 .
* Policies can use glob patterns, such as * and +, to match multiple paths or segments with a single rule. For example, path "secret/*" matches any path starting with secret/, and path "secret/+/config" matches any path with two segments after secret/ and ending with config 4 .
* Policies can use templating to interpolate certain values into the rules, such as identity information, time, randomness, etc. For example, path "secret/{{identity.entity.id}}/*" matches any path starting with secret/ followed by the entity ID of the requester 5 .
* Policies can be managed by using the vault policy commands or the sys/policy API endpoints. You can write, read, list, and delete policies by using these interfaces 6 .
The default policy is a built-in policy that is attached to all tokens by default and cannot be deleted. However, the default policy can be modified by using the vault policy write command or the sys/policy API endpoint. The default policy provides common permissions for tokens, such as renewing themselves, looking up their own information, creating and managing response-wrapping tokens, etc 7 .
You do not have to use YAML to define policies, as Vault supports both HCL and JSON formats. HCL is a human-friendly configuration language that is also JSON compatible, which means that JSON can be used as a valid input for policies as well 8 .
Vault does not need to be restarted in order for a policy change to take effect, as policies are stored and evaluated in memory. Any change to a policy is immediately reflected in the system, and any token or role that has that policy attached will be affected by the change.
: 1 (https://developer.hashicorp.com/vault/docs/concepts/policies), 2 (https://developer.hashicorp.com/vault
/docs/concepts/policies), 3 (https://developer.hashicorp.com/vault/docs/concepts/policies), 4 (https://developer.hashicorp.com/vault/docs/concepts/policies), 5 (https://developer.hashicorp.com/vault/docs
/concepts/policies), 6 (https://developer.hashicorp.com/vault/docs/commands/lease), 7 (https://developer.
hashicorp.com/vault/docs/concepts/policies), 8 (https://developer.hashicorp.com/vault/docs/concepts
/policies), (https://developer.hashicorp.com/vault/docs/concepts/policies#policy-updates)
質問 # 213
Without logging into another interface, what feature can Chad use to execute a simple CLI command to enable a new secrets engine?
- A. Client count details (Feature 3)
- B. Access management link (Feature 4)
- C. User information button (Feature 2)
- D. CLI emulation in the Vault UI (Feature 1)
正解：D
解説：
Comprehensive and Detailed in Depth Explanation:
The Vault UI includes a feature allowing CLI commands to be executed directly within the interface, known as the CLI emulation or REPL (Read-Eval-Print Loop) terminal. The HashiCorp Vault documentation states:
"The Vault GUI includes an advanced mode that uses a read-eval-print loop (REPL) terminal to mimic basic create/read/update/delete/list (CRUDL) commands for users who are more familiar with the Vault CLI than the GUI." This feature enables Chad to run a command like vault secrets enable <engine> without switching to a separate CLI, fulfilling the requirement.
The documentation under "Explore the Vault UI" adds: "This terminal allows users to execute Vault CLI commands directly from the web interface, enhancing usability for those accustomed to CLI workflows." Options like user information (B), client count details (C), and access management (D) do not provide CLI execution capabilities. Thus, A is correct.
Reference:
HashiCorp Vault Documentation - Getting Started UI: Explore the Vault UI
質問 # 214
What header must be included in an API request in order to provide authentication validation?
- A. X-Token-Creds
- B. X-Token-Vault
- C. X-Vault-Creds
- D. X-Vault-Token
正解：D
解説：
Comprehensive and Detailed In-Depth Explanation:
For Vault API authentication:
* B. X-Vault-Token : " The token for authentication is set directly as a header for the HTTP API. The header should be either X-Vault-Token: < token > or Authorization: Bearer < token > . " This header carries the client token required to validate the request's authenticity and permissions.
* Incorrect Options :
* A. X-Token-Vault : Incorrect naming convention. " Does not follow the standard naming conventions. "
* C. X-Token-Creds : Not recognized by Vault. " Does not align with standard authentication headers. "
* D. X-Vault-Creds : Invalid for authentication. " Does not correspond to the standard mechanism.
"
The X-Vault-Token header is critical for secure API interactions.
Reference: https://developer.hashicorp.com/vault/docs/auth/token#authentication
質問 # 215
You would like to provision virtual machines (VMs) using infrastructure as code (IaC). The VMs require an OAuth token to access GCP services during provisioning. You are required to use tokens that can be generated and revoked automatically.
Which secrets engine would meet this need?
- A. Google Cloud secrets engine
- B. SSH secrets engine
- C. Key/Value secrets engine version 2
- D. Identity secrets engine
正解：A
解説：
The Google Cloud secrets engine is the correct choice because it is designed to manage GCP credentials and can generate access credentials for Google Cloud workloads. In this scenario, the VMs need OAuth tokens for GCP services during IaC provisioning. The Identity secrets engine manages Vault identities and aliases, not GCP OAuth credentials. KV v2 stores static secrets and versions them, but it does not dynamically generate GCP access tokens. The SSH secrets engine is for SSH credential workflows, not Google Cloud API access.
The Google Cloud secrets engine supports access-token workflows and service-account based credential management for GCP resources, making it the only option that matches the requirement for GCP OAuth access during provisioning. HashiCorp documents GCP access-token behavior under the Google Cloud secrets engine.
質問 # 216
What occurs when a Vault cluster cannot maintain a quorum while using the Integrated Storage backend?
- A. Vault continues to operate in read-only mode until quorum is restored
- B. Vault temporarily switches to local storage until quorum is regained
- C. The cluster becomes unavailable and cannot commit new logs
- D. Vault automatically promotes a standby node to a leader to restore quorum
正解：C
解説：
Comprehensive and Detailed In-Depth Explanation:
Integrated Storage (Raft) requires a quorum:
* B. Unavailable: "If a cluster cannot achieve quorum, the cluster becomes unavailable and cannot commit new logs." Quorum is "a majority of members from a peer set," e.g., 3 of 5 nodes.
* Incorrect Options:
* A. Read-Only: "Does not continue to operate in read-only mode."
* C. Auto-Promotion: "Does not automatically promote a standby node."
* D. Local Storage: "Does not temporarily switch to local storage."
Quorum loss halts operations to ensure consistency.
Reference:https://developer.hashicorp.com/vault/docs/v1.16.x/internals/integrated-storage
質問 # 217
A web application uses Vault's transit secrets engine to encrypt data in-transit. If an attacker intercepts the data in transit which of the following statements are true? Choose two correct answers.
- A. The keys can be rotated and min_decryption_version moved forward to ensure this data cannot be decrypted
- B. You can rotate the encryption key so that the attacker won't be able to decrypt the data
- C. Even if the attacker was able to access the raw data, they would only have encrypted bits (TLS in transit)
- D. The Vault administrator would need to seal the Vault server immediately
正解：A、C
解説：
A web application that uses Vault's transit secrets engine to encrypt data in-transit can benefit from the following security features:
* Even if the attacker was able to access the raw data, they would only have encrypted bits (TLS in transit). This means that the attacker would need to obtain the encryption key from Vault in order to decrypt the data, which is protected by Vault's authentication and authorization mechanisms. The transit secrets engine does not store the data sent to it, so the attacker cannot access the data from Vault either.
* The keys can be rotated and min_decryption_version moved forward to ensure this data cannot be decrypted. This means that the web application can periodically change the encryption key used to encrypt the data, and set a minimum decryption version for the key, which prevents older versions of the key from being used to decrypt the data. This way, even if the attacker somehow obtained an old version of the key, they would not be able to decrypt the data that was encrypted with a newer version of the key.
The other statements are not true, because:
* You cannot rotate the encryption key so that the attacker won't be able to decrypt the data. Rotating the key alone does not prevent the attacker from decrypting the data, as they may still have access to the old version of the key that was used to encrypt the data. You need to also move the min_decryption_version forward to invalidate the old version of the key.
* The Vault administrator would not need to seal the Vault server immediately. Sealing the Vault server would make it inaccessible to both the attacker and the legitimate users, and would require unsealing it with the unseal keys or the recovery keys. Sealing the Vault server is a last resort option in case of a severe compromise or emergency, and is not necessary in this scenario, as the attacker does not have access to the encryption key or the data in Vault. References: Transit - Secrets Engines | Vault | HashiCorp Developer, Encryption as a service: transit secrets engine | Vault | HashiCorp Developer
質問 # 218
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