● 以下关于汉字编码的叙述中,错误的是 (6) 。
(6)
● For (71) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (72) for every packet sent. Instead, when a connection is established, a route from the (73) machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (74) . That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works. When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (75) telling which virtual circuit it belongs to.
(71)
● 常用的外部网关协议是 (70) 。
(70)
● 交换机当前状态处于局部配置模式的是 (68) 。
(68)
● 下列路由器命令中用于激活接口的命令是 (69) 。
(69)
● 将域名转换成IP地址是由 (66) 协议来完成的,将 IP地址转换成 MAC地址是由 (67) 协议来完成的。
(66)
● 下面选项中,可用来标识Internet文档的是 (65) 。
(65)
● 某网站默认文档为index.html,在浏览该网站时看到文字、 音乐和图像, 则 (64)
(64)
● 包过滤防火墙对数据包的过滤依据不包括 (62) 。
(62)
● 为实现跨网段的DHCP服务,需在路由器上设置DHCP (63) 。
(63)
● 能防范重放攻击的技术是 (60) 。
(60)
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