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How do yWhich threeRefertotheexhibit.IfWhat is Which command is use什么是词dynamic的含义显示在显示帧What are three validWhich of the followiRefer to tWhat are Refer to tWhat is the purpose After enabling以下放大倍数中CorelDRAW不能达到If you cBasedontheshowipbgpsWhich two̳Refer to What does̳When designing
