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| Section | Objectives |
|---|---|
| Vault Fundamentals | - Vault Architecture Overview - Core Concepts (Secrets, Tokens, Policies) |
| Security and Operational Use Cases | - Audit Devices and Logging - Encryption as a Service |
| Authentication & Authorization | - Auth Methods (AppRole, LDAP, Token, etc.) - Policies and Access Control |
| Secrets Management | - Secret Rotation and Revocation - Dynamic Secrets and Leasing - KV Secrets Engine |
| Vault Configuration & Operations | - Vault Initialization and Unsealing - Storage Backends and Configuration |
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질문 # 185
What type of Vault token does not have a TTL (Time to Live)?
정답：E
설명：
Comprehensive and Detailed in Depth Explanation:
Root tokens in Vault are unique in lacking a TTL. The HashiCorp Vault documentation states: "Non-root tokens are associated with a TTL, which determines for how long a token is valid. Root tokens are not associated with a TTL, and therefore, do not expire." It provides an example: "For example, notice that the value for token_duration is the infinity symbol, meaning it lives forever," as seen in a vault login output for a root token.
The docs elaborate: "Root tokens are tokens with an infinite TTL that have the 'root' policy attached to them.
Because of their power, it is strongly recommended that they be used only as necessary and then immediately revoked when no longer needed." In contrast:
* Child tokens (A)inherit TTLs from parents.
* Parent tokens (B)typically have TTLs unless they are root.
* Service tokens (C)have configurable TTLs for ongoing use.
* Batch tokens (E)have fixed TTLs for ephemeral tasks.Thus, D (Root tokens) is correct.
Reference:
HashiCorp Vault Documentation - Tokens: Token Time to Live
질문 # 186
You are using the Vault userpass auth method mounted at auth/userpass. How do you create a new user named " sally " with password " h0wN0wB4r0wnC0w " ? This new user will need the power-users policy.
정답：B
설명：
To create a new user named "sally" with password "h0wN0wB4r0wnC0w" and the power-users policy, you would use the Vault userpass auth method mounted at auth/userpass. You would use the following command:
"vault write auth/userpass/users/sally password=h0wN0wB4r0wnC0w policies=power-users". This command would create a new user named "sally" with the specified password and policy. References :
* [Userpass Auth Method | Vault | HashiCorp Developer]
* [Create Vault policies | Vault | HashiCorp Developer]
질문 # 187
What is the result of the following Vault command?
$ vault auth enable kubernetes
정답：B
설명：
Comprehensive and Detailed in Depth Explanation:
The command vault auth enable kubernetes enables the Kubernetes authentication method in Vault. The HashiCorp Vault documentation states: "In order to enable auth methods, the command should be vault auth
<enable/disable> followed by the name of the auth method." Specifically, for Kubernetes, it explains: "The vault auth enable kubernetes command mounts the Kubernetes auth method to the default path of kubernetes
/." This allows Vault to authenticate Kubernetes workloads using their service account tokens at the path auth
/kubernetes/.
The documentation elaborates: "Once enabled, the Kubernetes auth method allows clients running in Kubernetes to authenticate with Vault using a Kubernetes Service Account Token. The default mount path is kubernetes/, though additional parameters can specify a different path." Option A is incorrect-Vault doesn't access usernames/passwords in Kubernetes; it uses tokens. Option C is wrong-it doesn't import secrets, only enables authentication. Option D is false-Vault doesn't become an Identity Provider (IdP); it authenticates against Kubernetes. Thus, B is correct.
Reference:
HashiCorp Vault Documentation - Secrets Enable Command
HashiCorp Vault Documentation - Kubernetes Auth Method
질문 # 188
You are deploying Vault in a local data center, but want to be sure you have a secondary Vault cluster in the event the primary cluster goes offline. In the secondary data center, you have applications that are running, as they are architected to run active/active. Which type of replication would be best in this scenario?
정답：A
설명：
Comprehensive and Detailed in Depth Explanation:
Vault supports two replication types:Performance ReplicationandDisaster Recovery (DR) Replication, each serving distinct purposes. The scenario involves an on-premises primary cluster and a secondary cluster in another data center, with active/active applications needing Vault access. Let's analyze:
* Option A: Disaster Recovery replicationDR replication mirrors the primary cluster's state (secrets, tokens, leases) to a secondary cluster, which remains in standby mode until activated (promoted) during a failover. It's designed for disaster scenarios where the primary is lost, not for active/active use. The secondary doesn't serve reads or writes until promoted, which doesn't suit applications actively running in the secondary data center. Incorrect.
* Option B: Performance replicationPerformance replication creates an active secondary cluster that replicates data from the primary in near real-time. It supports read operations locally, reducing latency for applications in the secondary data center, and can handle writes (forwarded to the primary). This fits an active/active architecture, providing redundancy and performance. If the primary fails, the secondary can continue serving reads (though writes need reconfiguring). Correct.
Detailed Mechanics:
Performance replication uses a primary-secondary model with log shipping via Write-Ahead Logs (WALs).
The secondary maintains its own storage, synced from the primary, and can serve reads independently. Writes are forwarded to the primary, ensuring consistency. In an active/active setup, applications in both data centers can query their local Vault cluster, leveraging the secondary's read capability. DR replication, conversely, keeps the secondary dormant, requiring manual promotion,which introduces downtime unsuitable for active apps.
Real-World Example:
Primary cluster at dc1.vault.local:8200, secondary at dc2.vault.local:8200. Apps in DC2 query the secondary for secrets (e.g., GET /v1/secret/data/my-secret), avoiding cross-DC latency. If DC1 fails, DC2 continues serving cached reads until a new primary is established.
Overall Explanation from Vault Docs:
"Performance replication... allows secondary clusters to serve reads locally, ideal for active/active setups...
DR replication is for failover, keeping secondaries in standby."
Reference:https://developer.hashicorp.com/vault/docs/enterprise/replication
질문 # 189
When unsealing Vault, each Shamir unseal key should be entered:
정답：C
설명：
When unsealing Vault, each Shamir unseal key should be entered by different administrators each connecting from different computers. This is because the Shamir unseal keys are split into shares that are distributed to trusted operators, and no single operator should have access to more than one share. This way, the unseal process requires the cooperation of a quorum of key holders, and enhances the security and availability of Vault. The unseal keys can be entered via multiple mechanisms from multiple client machines, and the process is stateful. The order of the keys does not matter, as long as the threshold number of keys is reached.
The unseal keys should not be entered at the command line in one single command, as this would expose them to the history and compromise the security. The unseal keys should not be encrypted with each administrator's PGP key, as this would prevent Vault from decrypting them and reconstructing the master key. References: https://developer.hashicorp.com/vault/docs/concepts/seal3, https://developer.hashicorp.com
/vault/docs/commands/operator/unseal
질문 # 190
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