试题详情单项选择题Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-in security mechanisms?()A、Frame RelayB、HDLCC、x.25D、PPP正确答案:D答案解析:关注下方微信公众号,在线模考后查看热门试题Which of the followiWhich of On which When a b在使用“艺术画笔”工具绘制图形时,能够获在ISO定义的七层参考模型中,对数据链路What are the three pVLAN 3 is not yet coWhich two statementsWhen testingA Fibre You are provisioningFollowing ticke以下能将模拟信号与数字信号互相转换的设备Which two̳What is What are You have just complewhat is 帧中继的使用链路层协议是()。