Answer: AWS Transit Gateway

## Explanation **AWS Transit Gateway** is the correct answer because it is specifically designed to connect multiple Amazon Virtual Private Clouds (VPCs) and on-premises networks through a central hub. ### Why AWS Transit Gateway is correct: 1. **Centralized Hub**: AWS Transit Gateway acts as a central hub that simplifies network architecture by connecting multiple VPCs, VPN connections, and AWS Direct Connect attachments. 2. **Scalability**: It can connect thousands of VPCs, making it ideal for large-scale network architectures. 3. **Simplified Management**: Instead of creating and managing multiple VPC peering connections (which would require n*(n-1)/2 connections for n VPCs), you can connect all VPCs to a single Transit Gateway. 4. **Transitive Routing**: Unlike VPC peering which doesn't support transitive routing, Transit Gateway enables transitive routing between all connected networks. ### Why the other options are incorrect: - **AWS Config**: This is a service for assessing, auditing, and evaluating AWS resource configurations, not for network connectivity. - **AWS Direct Connect**: This service establishes a dedicated network connection from on-premises to AWS, but it's not designed to connect multiple VPCs together. - **Amazon GuardDuty**: This is a threat detection service that continuously monitors for malicious activity and unauthorized behavior, not a networking service. ### Key Use Cases for AWS Transit Gateway: - Connecting multiple VPCs across different AWS accounts and regions - Centralizing network traffic inspection and security controls - Simplifying network management for large organizations - Enabling hybrid cloud architectures with on-premises data centers This question tests knowledge of AWS networking services and their specific use cases, which is fundamental for the AWS Certified Cloud Practitioner exam.

Author: Ritesh Yadav