350-401 Question 175
Single answerAn enterprise network has deployed a wireless infrastructure across multiple buildings. Users frequently move between these buildings, and the IT team wants to ensure uninterrupted connectivity and consistent IP addressing for mobile devices. Which technology or concept should the IT team implement to achieve this?
- A
Layer 2 roaming with centralized control
- B
Layer 3 roaming with local breakout
- C
Layer 3 roaming with anchor controllers
- D
Layer 2 roaming with distributed control
Show answer and explanation
Correct answer: C
Explanation
Layer 3 roaming with anchor controllers is the ideal solution for scenarios where users move across subnets while requiring consistent IP addressing. This approach uses tunneling to forward user traffic back to a designated anchor controller, avoiding the need for devices to acquire new IP addresses when transitioning between subnets. This is particularly useful in large, multi-building environments.
- A. Incorrect.
Layer 2 roaming with centralized control ensures seamless mobility within the same VLAN or subnet but cannot maintain consistent IP addressing across different subnets or buildings.
- B. Incorrect.
Layer 3 roaming with local breakout allows devices to roam across subnets but does not ensure consistent IP addressing, as IPs are assigned based on the new subnet.
- C. Correct.
Layer 3 roaming with anchor controllers is designed for seamless mobility across different subnets while maintaining consistent IP addressing by tunneling traffic back to an anchor controller.
- D. Incorrect.
Layer 2 roaming with distributed control ensures roaming within the same Layer 2 domain but does not account for mobility across different subnets or buildings.