200-901 Application Deployment and Security Practice Question
Which Docker network driver allows a container to share the host's network stack, giving it direct access to host interfaces?
⚠ Common exam trap
Cisco often tests the misconception that 'bridge' is the default and most common driver, leading candidates to choose it when the question specifically asks for sharing the host's network stack, which only the 'host' driver provides.
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
✓
host
The 'host' network driver in Docker removes network isolation between the container and the host, allowing the container to use the host's network stack directly. This means the container binds to host interfaces and ports without NAT or port mapping, giving it direct access to the host's IP address and network configuration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
none
Why it's wrong here
None disables networking entirely.
- ✗
overlay
Why it's wrong here
Overlay is used for multi-host networking in Swarm.
- ✗
bridge
Why it's wrong here
Bridge creates an isolated network for containers on the same host.
- ✓
host
Why this is correct
Host mode shares the host's network stack.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-901 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-901 exam.