单选题lA network attack is an attempt to gain()access to an organization’s network,with the objective of stealing data or performing other malicious activities.Plagiarism is A()-of-service(DoS)attack is a cyber-attack in which the attacker seeks to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a host connected to a network.In the case of a simple attack,a()could have a simple rule added to deny all incoming traffic from the attackers,based on protocols,ports,or the originating IP addresses.In a(作答此空)DoS(DDoS)attack ,the incoming traffic flooding the victim originates from()different sources.This effectively makes it impossible to stop the attack simply by blocking a single source.
单选题某公司中,最大的局域网可容纳200个主机,最小的局域网可容纳20个主机,若使用可变长子网掩码划分子网,其最长的掩码 位, 最短的掩码作答此空位。
单选题在DNS服务器中的(37)________________资源记录定义了区域的邮件服务器及其优先级。
单选题下列Wifi认证方式中,( )使用了AES加密算法,安全性更高。
单选题在 Linux 中,可以使用()命令创建一个文件目录。
单选题以下关于OSFP路由协议的说法中,错误的是 。
单选题某公司局域网使用DHCP动态获取10.1.0.100网段的IP地址,某终端获得了192.168.1.104 网段的地址,可在接入层交换机上配置_ 功能杜绝该问题再次出现。
单选题关于DHCPOffer报文的说法中,(36)________________是错误的。
单选题某公司为多个部门划分了不同的局域网,每个局域网中的主机数量如下表所示。计划使用地址段192.168.10.0/24划分子网,以满足公司每个局域网的IP地址需求,请为各部门选择最经济的地址段或子网掩码长度。作答(54)空
单选题RIP协议默认的路由更新周期是(26)________________秒。
单选题使用(39)________________命令释放当前主机自动获取的IP地址。
单选题在对服务器的日志进行分析时,发现某一时同段,网络中有大量包含USER PASS负载的数据,该异常行为最可能是( )。
单选题lA network attack is an attempt to gain(作答此空)access to an organization’s network,with the objective of stealing data or performing other malicious activities.Plagiarism is A()-of-service(DoS)attack is a cyber-attack in which the attacker seeks to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a host connected to a network.In the case of a simple attack,a()could have a simple rule added to deny all incoming traffic from the attackers,based on protocols,ports,or the originating IP addresses.In a()DoS(DDoS)attack ,the incoming traffic flooding the victim originates from()different sources.This effectively makes it impossible to stop the attack simply by blocking a single source.
单选题在 BGP 路由选择协议中,()属性可以避免在 AS 之间产生环路。
单选题采用双极型AMI编码进行数据传输,若接收的波形如下图所示
单选题SOA(面向服务的架构)是一种()服务架构。
单选题对十进制数47和0.25分别表示为十六进制形式,为( )。
单选题下列关于HTTPS和HTTP协议的描述中,错误的是( )。
单选题在OSI参考模型中,传输层处理的数据单位是 。
单选题在Linux系统通过( )指令,可以拒绝IP地址为192.168.0.2 的远程主机登入到该服务器。
