AWS account

A container for AWS resources, with its own identities and its own bill.

Think of it as: A flat in an apartment building. Separate locks, separate meter.

What to know for Level 0

An account is the strongest isolation boundary in AWS: nothing in one account can reach another unless it's explicitly allowed. That's why Prod and Dev get separate accounts, each with its own bill and limits.

More detail

Every account has a 12-digit account ID and one root user. Resources in one account can’t reach another account unless you explicitly allow it, which makes accounts the strongest isolation boundary in AWS. Real companies run many accounts (Prod, Dev, logging, security) inside one organization.

Quiz yourself on AWS account →

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