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Answer: Compile all keys into a properly formatted file and use the `gcloud compute project-info add-metadata` command to upload them to the project's metadata.
**Correct Option:** D. Compile all keys into a properly formatted file and use the `gcloud compute project-info add-metadata` command to upload them to the project's metadata: This approach is correct because it applies the SSH keys to all instances within the project, including the Bastion host, in one efficient step. **Incorrect Options:** A. Format the keys as required and manually upload each key one by one through the user interface: This method is inefficient and time-consuming, as it requires manual uploads for each key. B. Use the `gcloud compute ssh` command to upload all the keys at once: This is incorrect because the `gcloud compute ssh` command is designed for SSH access, not for uploading SSH keys. C. Compile all keys into a properly formatted file and use the `gcloud compute instances add-metadata` command to upload them to each instance individually: While this method works, it is less efficient than applying the keys at the project level, as it requires repeating the process for each instance.
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Your team needs to deploy all public SSH keys to a specific Bastion host instance within a particular project. After collecting all the keys, what is the most efficient method to deploy them with minimal steps?
A
Format the keys as required and manually upload each key one by one through the user interface.
B
Use the gcloud compute ssh command to upload all the keys at once.
C
Compile all keys into a properly formatted file and use the gcloud compute instances add-metadata command to upload them to each instance individually.
D
Compile all keys into a properly formatted file and use the gcloud compute project-info add-metadata command to upload them to the project's metadata.