What is the purpose of a Vault Lock policy in AWS?

The purpose of a Vault Lock policy in AWS is to restrict access to a vault. Vault Lock is a feature of AWS Glacier that allows users to enforce specific policies that govern how data in the vault can be accessed or modified. By locking down a vault, you ensure that certain access policies cannot be altered, thereby securing the contents against unauthorized access or accidental deletion.

Implementing Vault Lock policies is particularly important for compliance purposes, as they help organizations ensure that the data retention and deletion rules are adhered to over time. Once a Vault Lock policy is set, it cannot be changed or removed, which adds a layer of protection for sensitive data stored in AWS Glacier.

The other options relate to different functionalities in AWS or are not directly associated with the core purpose of Vault Lock. For instance, simplifying instance launch pertains to EC2 configurations, managing AWS resources involves broader services than just the vault, and monitoring network traffic relates to security services like AWS VPC Flow Logs or AWS GuardDuty rather than data vaulting.