Question 1
Q1A multinational corporation is designing a hub-and-spoke network topology on IBM Cloud. They have multiple VPCs in different MZRs (us-south, eu-de) that need to communicate with each other and with their on-premises data centers connected via Direct Link. The primary goals are centralized routing control, simplified network management, and avoiding complex VPC peering meshes. Which IBM Cloud networking service is specifically designed to act as a cloud network hub to connect VPCs and classic infrastructure across regions and with on-premises networks?
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Correct answer: C
IBM Cloud Transit Gateway is the managed service designed for this exact purpose. It simplifies connectivity by acting as a central hub, connecting VPCs, classic infrastructure, and on-premises networks without requiring a full mesh of VPC peerings. A VRA is a valid but less-managed approach requiring more operational overhead. CIS is for edge services like DDoS and WAF, not internal routing. A full mesh of VPC peerings is complex to manage and does not scale well.