试题详情单项选择题在封装HDLC协议的接口上,设定状态轮询定时器时间间隔的命令是()。A、hdlc keepaliveB、keep aliveC、hdlc timeoutD、timer hold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OSI层次的划分应当从逻辑上将功能分开,Which VPN̳There are no boot syWhich service&Which threeWhich two rout EAP-FAST proviWhich two̳Which three关于Internet,以下说法正确的是(Which benefit&如何选取文本中的整个段落()Which interfacTheswitchesshowninthRefer to tWhich of Which two̳哪一个二层协议封装支持同步和异步电路并内What are three IPv6 Which antenna&