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。
单选题AI芯片是当前人工智能技术发展的核心技术,其能力要支持训练和推理。通常,AI芯片的技术架构包括( )等三种。
单选题以下关于存储形态和架构的描述中,错误的是( )。
单选题某信道采用16种码元传输数据,若信号的波特率为4800 Baud,则信道传输速率为( )kb/s。
单选题PPP协议中用于识别网络层协议的是( )。
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 (回答此处 )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 ( ) 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.
单选题硬盘做RAID,读写性能最高的是( )。
单选题若系统正在将( )文件修改的结果写回磁盘时系统发生掉电,则对系统的影响相对较大。
图中所示是一个园区网的一部分,交换机A和B是两台接入层设备,交换机C和D组成核心层,交换机E将服务器群连接至核心层。如图所示,如果采用默认的STP设置和默认的选举过程,其生成树的最终结果为(68)。这时交换机B上的一台工作站要访问园区网交换机E上的服务器其路径为(69)。由此可以看出,如果根网桥的选举采用默认配置,下列说法中不正确的是(70)。
DHCP服务器分配的默认网关地址是220.115.5.33/28,__________是该子网的主机地址。
IETF定义的集成服务(IntServ)把Intemet服务分成了三种服务质量不同的类型,这三种服务不包括( )。