200-901 Application Deployment and Security Practice Question
A Kubernetes pod has two containers: a main application and a sidecar proxy. They need to communicate via localhost. Which pod networking model allows this?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Pod network (containers share the same IP)
Containers in the same pod share the same network namespace, so they can communicate via localhost.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Host network
Why it's wrong here
Host network uses the host's network stack, not the pod's internal network.
- ✗
Bridge network
Why it's wrong here
Bridge network is for containers across different hosts or pods, not within the same pod.
- ✗
Overlay network
Why it's wrong here
Overlay networks connect pods across nodes, not within a single pod.
- ✓
Pod network (containers share the same IP)
Why this is correct
All containers in a pod share the same network namespace, allowing localhost communication.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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