某主机的IP地址为210.117.100.12/21,其子网掩码是() ["255.255.248.0","255.255.240.0","255.255.252.0","255.255.255.0"]
中国共产党维护和发展国内各民族的平等、团结、()关系,坚持和完善民族区域自治制度,实现各民族的共同繁荣和全面进步。 ["互助","互利","协助","互赢"]
近距离的联网叫() ["LAN","MAN","WAN","Internet"]
对于需要按规定进行验收的、搭设高度超过60m的落地式钢管脚手架工程,需要由()来组织验收。 ["专业承包单位","总承包单位","设计单位","建设单位"]
广域网的英文缩写为() ["LAN","MAN","WAN","Internet"]
千兆位以太网中,使用帧突发和()技术解决短帧传输的问题。