An Architect designed an application to run across multiple IBM Cloud Kubernetes Service clusters from different regions. What should the Architect utilize to direct the traffic across clusters?

Question

Options

• ADirect Link Connect
• BVPC Network Load Balancer
• CIBM Cloud Internet Services
• DTransit Gateway

• A
  2% (1)
• B
  12% (5)
• C
  76% (32)
• D
  10% (4)

Explanation

IBM Cloud Internet Services (CIS) is the correct choice because it provides Global Load Balancing (GLB), which intelligently distributes incoming traffic across endpoints in multiple geographic regions - exactly what's needed to route users to the appropriate Kubernetes cluster. CIS operates at the DNS/HTTP layer and performs health checks to ensure traffic is only sent to healthy clusters.

Why the distractors are wrong:

• A. Direct Link Connect - provides private, dedicated network connectivity between on-premises infrastructure and IBM Cloud; it doesn't route traffic between clusters.
• B. VPC Network Load Balancer - operates within a single VPC and region; it cannot span multiple regions.
• D. Transit Gateway - connects VPCs and classic infrastructure networks privately; it's for internal network routing, not directing external client traffic across regions.

Memory tip: Think of CIS as your "Internet-facing traffic cop" - anything that needs to direct users across regions goes through CIS (the Internet service), while Transit Gateway and Direct Link handle private network plumbing. If the question mentions "multiple regions" and "user traffic," CIS is almost always the answer.

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