Dual-Stack
Dual-stack means running IPv4 and IPv6 simultaneously on the same network.
Updated: 2026-03-05
Definition
Dual-stack allows devices and services to communicate over both IPv4 and IPv6 during transition.
It’s a common migration strategy before going IPv6-only.
Key points
- Supports both protocols
- Simplifies gradual migration
- Needs consistent routing and security controls for both
Common mistakes
- Securing IPv4 but leaving IPv6 open.
- DNS records and routing not aligned between stacks.
Related exams
Related terms
Want to practice this in exam-style questions?
Use the mini tests on each exam page, then continue in the app for offline packs and detailed explanations.
Go to exams