单项选择题
If all OSPF routers on a broadcast network have the same OSPF priority， what parameter is used to determine the new BDR at the time of a DR failure？（）
A. area ID B. router ID C. loopback address D. IP address of interface on broadcast network
单项选择题 运输标志是指（）。
判断题 评审专家对与自己有利害关系的评审项目，如受到邀请，应主动提出回避。
单项选择题 A virus scanner is running on a computer and scans all files currently in use. Why should a full scan be performed periodically?（）
