Information technology - telecommunications and information exchange between systems - list of standard data link layer protocols that utilize high - level data link control classes of procedures and list of standardized xid format identifiers and private parameter set identification values 信息技术.系统间电信和信息交换.利用高级数据链控制过程分级的标准数据链层协议目录和标准xid格式标识符及专用参数集标识值目录
