unspecified bit rate câu

Câu ví dụ

1. Available ATM service: Generally four data bit rates are available for ATM services: constant bit rate (CBR), variable bit rate (VBR), available bit rate (ABR) and unspecified bit rate (UBR).
   ATM cung cấp 3 loại dịch vụ : Constant Bit Rate(CBR), Available Bit Rate ( ABR), Variable Bit Rate ( VBR) và Unspecified Bit Rate (UBR).