A company wants to migrate to AWS. The company wants to use a multi-account structure with centrally managed access to all accounts and applications. The company also wants to keep the traffic on a…

Deploying a landing zone with AWS Control Tower establishes a well-architected multi-account environment, setting up the foundational structure and governance needed for the company's migration.

AWS Security Hub is a security posture management service for collecting and analyzing security findings, not for managing cross-account access or network routing.

Creating Transit Gateways and VPC attachments provides a central hub for private network connectivity across all accounts, enabling the required granular routing rules between development, staging, production, and shared network accounts.

Setting up AWS IAM Identity Center (AWS SSO) centrally manages access to all AWS accounts and applications, enforces MFA at login, and allows specific roles to be assigned to user groups, meeting the identity and access management requirements with low operational overhead.

AWS Control Tower focuses on governance and account provisioning within an organization, not on managing network routing between accounts, which is the function of services like Transit Gateway.

While IAM users/groups and MFA are important, for a multi-account setup with centralized access and lower operational overhead, AWS IAM Identity Center is the superior solution compared to individual IAM users in each account, and Amazon Cognito is typically for external users, not internal workforce.