单选题电子邮件中的两个协议中,( )协议是运行在传输程序与远程邮件服务器之间的协议
单选题要跟踪到达主机corp7.microsoft.com的路径,输入的命令是______。 A.tracert corp7.microsoft.com B.route cort7.microsoft.com C.ping corp7.microsoft.com D.netstat corp7.microsoft.com
单选题无线局域网新标准IEEE 802.11n提供的最高数据速率可达到______。 A.11Mbps B.54Mbps C.100Mbps D.300Mbps
单选题常用的外部网关协议是______。 A.RIPv2 B.IGRP C.BGP4 D.OSPFv2
单选题下列关于DNS的叙述,错误的是______。
单选题An internet is a combination of networks connected by (26) .When a datagram goes from a source to a (27) ,it will probably pass many (28) until it reaches the router attached to the destination network.A router receives a (29) from a network and passes it to another network.A router is usually attached to several networks.When it receives a packet,to which network should it pass the packet? The decision is based on optimization:Which of the available (30) is the optimum pathway?
单选题 {{B}}[{{/B}}问题4{{B}}]{{/B}} 如果已知某台服务器的IP地址,可以从图7-5的{{U}}
(9) {{/U}}获得该主机的域名。图7-5中正向查找区域“test.com.cn”默认的区域文件名是{{U}} (10)
{{/U}};名称为“WWW”的主机资源记录默认的生存时间为{{U}} (11) {{/U}}秒。
单选题若码值FFH是一个整数的原码表示,则该整数的真值为 (4) ;若码值FFH是一个整数的补码表示,则该整数的真值为 (5) ;若码值FFH是一个整数的反码表示,则该整数的真值为 (6) 。
单选题A management domain typically contains a large amount of management information. Each individual item of ______ information is an instance of a managed object type. The definition of arelated set of managed ______ types is contained in a Management Information Base(MIB) module. Many such MIB modules are defined. For each managed object type it describes, a MIB______ defines not only the semantics and syntax of that managed object type, but also the method ofidentifying an individual instance so that multiple ______ of the same managed object type can bedistinguished. Typically, there are instances of each managed object ______ within a managementdomain.
单选题按照《中华人民共和国著作权法》的权利保护期,下列权项中,受到永久保护的是______。
单选题噪声是如何影响数字信号的?______
单选题若某个计算机系统中,内存地址与I/O地址分别编址,访问内存单元和I/O设备是靠 (30) 来区分的。
单选题调制解调器是______。
单选题作为XML文档,其必要条件是______。
单选题下列IP中,( )不是InterNIC保留的PrivateIP
单选题在单一物理信道上复用有多种方式,在______中,所有用户轮流地瞬时占有整个频带。
单选题《中华人民共和国反不正当竞争法》中商业秘密的法律条件是______、价值性和保密性。
单选题防治特洛伊木马的有效手段不包括______。 A.不随意下载来历不明的软件 B.使用木马专杀工具 C.使用IPv6协议代替IPv4协议 D.运行实时网络连接监控程序
单选题将文件bcm5700-8.3.14.tar.gz解压缩的命令是______。
单选题可以在HTML文档中加上阅读者看不见的注释,句法是______。
