350-401 Question 73
Single answerA network engineer is tasked with deploying a virtualized network function (VNF) for a new branch office. The requirement is to ensure minimal downtime during updates of the VNF and to support seamless scalability. Which virtualization feature should the engineer prioritize to meet these requirements?
- A
Live migration
- B
Nested virtualization
- C
Hypervisor-based resource scheduling
- D
Containerization
Show answer and explanation
Correct answer: A
Explanation
Live migration is a critical feature in virtualization that enables the movement of a virtual machine (or VNF) from one physical host to another without interrupting the service. This capability ensures minimal downtime during updates and supports seamless scalability, making it the ideal choice for the given scenario.
- A. Correct.
Live migration allows a virtual machine (or VNF) to be moved from one host to another without downtime, ensuring high availability and seamless scalability during updates or maintenance.
- B. Incorrect.
Nested virtualization refers to running a hypervisor within a virtual machine. While useful in some scenarios, it does not specifically address the need for minimal downtime or seamless scalability.
- C. Incorrect.
Hypervisor-based resource scheduling is beneficial for optimizing resource usage across multiple virtual machines but does not directly ensure minimal downtime during updates.
- D. Incorrect.
Containerization focuses on deploying and managing lightweight, isolated environments, but it does not inherently provide the seamless migration capability required to ensure minimal downtime.