单选题TCP协议是( )。

单选题以下关于三层C/S结构的叙述中，不正确的是( )。

单选题以下关于EFS(Encrypting File System) 的描述中，错误的是( )。

单选题高可用网络设计的核心目标是( )。

单选题An advanced persistent threat (APT) is a covert ( ) attack on a computer network where the attacker gains and maintains ( ) access to the targeted network and remains undetected for a significant period. An APT isa sophisticated, long-term and ( )attack, usually orchestrated by nation-state groups, cor well-organized criminal enterprises. During the time between infection and remediation the hacker will often monitor, intercept, and relay information and sensitive data. The intention of an APT is usually to ( ) or steal data rather than cause a network outage, denial of service or infect systems with malware. APTs often use social engineering tactics or exploit security (回答此处 ) in networks, applications or files to plant malware on target systems. A successful advanced persistent threat can be extremely effective and beneficial to the attacker.

单选题编译器与解释器是语言翻译的两种基本形态，以下关于编译器工作方式及特点的叙述中，正确的是( )。

单选题在BGP路由协议中，用于建立邻居关系的是( )报文。

单选题以下关于软件著作权产生时间的叙述中，正确的是( )

单选题IPSec的两个基本协议是AH和ESP,下面不属于AH协议的是( )。

单选题路由信息中不包括( )。

单选题An advanced persistent threat (APT) is a covert ( ) attack on a computer network where the attacker gains and maintains ( ) access to the targeted network and remains undetected for a significant period. An APT isa sophisticated, long-term and ( )attack, usually orchestrated by nation-state groups, cor well-organized criminal enterprises. During the time between infection and remediation the hacker will often monitor, intercept, and relay information and sensitive data. The intention of an APT is usually to (回答此处 ) or steal data rather than cause a network outage, denial of service or infect systems with malware. APTs often use social engineering tactics or exploit security ( ) in networks, applications or files to plant malware on target systems. A successful advanced persistent threat can be extremely effective and beneficial to the attacker.

单选题鸿蒙操作系统(HarmonyOS)为华为公司研制的一款自主版权的智能操作系统，它提出一套系统能力、适配多种终端形态的分布式理念。以下关于鸿蒙操作系统的叙述中，以下关于鸿蒙操作系统的叙述中，不正确的是( )。

单选题交换机SWA、SWB通过两根光纤千兆以太网链路连接在一起，其中交换机A上有如下接口配置：[SWA]interface GigabitEthernet 1/0/1[SWA-GigabitEthernet1/0/1] gvrp[SWA-GigabitEthernet1/0/1] port link-type trunk[SWA-GigabitEthernet1/0/1] port trunk permit vlan 110[SWA] interface GigabitEthernet 1/0/2[SWA-GigabitEthernet1/0/2] port link-type trunk[SWA-GigabitEthernet1/0/2] port trunk permit vlan 110若在SWA交换机上开启MSTP,则下列描述正确的是( )。

单选题如果一个链路每秒发送4000个帧，每个时隙8个比特，则该采用TDM的链路数据传输速率为( )。

单选题培训教室安装有120台终端电脑和3台48口千兆以太网交换机，3台交换机依次级联，终端电脑通过5类非屏蔽双绞线连接交换机，双绞线和电源线共用防静电地板下的线槽从机柜敷设到各终端电脑处。安装完成后培训教室内的电脑相互ping测试，发现时有丢包现象，丢包率约1-2%,造成 该现象的原因可能是( )。

单选题如下图所示，假设su服务器要分发一个5G比特的文件给5个对等体(Peer),服务器上传带宽Us为54Mbps,5个对等体的上传带宽分别为： ul=19Mbps、u2=10Mbps 、u3=19Mbps 、u4=15Mbps 、u5=10Mbps; 下载带分别为：d1=24Mbps、 d2=24 、d3=24Mbps 、d4=27Mbps 、d5=29Mbps 。则采用C/S模式和P2P模式传输最小时间分别是( )秒。