Refer to the passage below and then answer the question afterwards in the same language as the passage: Passage: ATM traffic contracts form part of the mechanism by which "quality of service" (QoS) is ensured. Kune mhando ina dzakakosha (uye dzakasiyana siyana) idzo imwe neimwe ine seti yema parameter anotsanangura kubatana. Mubvunzo: QoS inomiririra chii?
kunaka kwebasa