Communication systems for and remote reading of meters - part 2 : physical and link layer 仪表的远程读数用通信系统.第2部分:物理层和链路层
Road vehicles - diagnostic systems - keyword protocol 2000 - part 2 : data link layer 道路车辆.诊断系统.关键词协议2000 .第2部分:数据链路层
In local networks , the data link layer often assumes the task to regulate access to a shared medium 在本地网络中，数据链路层假设任务控制使用共享媒介。
Communication systems for and remote reading of meters - part 2 : physical and link layer ; english version en 13757 - 2 : 2004 仪表及其远程读数的通信系统.第2部分:物理层和链路层
If errors occur , then the data link layer is responsible for detecting such errors and retransmitting the data frames 如果发生错误，那么数据链路层有责任检测，并重发数据帧。
Tractors and machinery for agriculture and forestry - serial control and communications data network - data link layer 农业和林业用拖拉机和机械.系列控制和通信数据网.数据链路层
The board can accomplish the functions specified by the physical layer and data link layer of worldfip protocol 通信卡能够完成worldfip协议所规定的物理层和数据链路层的所有功能。
