Listening Quiz: Đánh Giá Sau Thay Đổi Mạng Nâng Cấp – Medium Level

1. What is the main topic of the conversation?
2. How much did the new routers improve the internet speed?
3. How long was the downtime during the upgrade?
4. What can be inferred about most users after the upgrade?
5. What will John do next?

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