● Each machine supporting TCP has a TCP transport entity, either a library procedure, a user process, or part of the kernel. In all case, it manages TCP streams and (71) to the IP layer. A TCP (72) accepts user data streams from local process, breaks them into pieces not exceeding 64KB, and sends each piece as a separate IP (73) . When datagrams containing TCP data arrive at a machine, they are given to the TCP entity, which reconstructs the original byte streams. The IP layer gives no guarantee that datagrams will be delivered properly, so it is up to TCP to time out and (74) them as need be. Datagrams do arrive may well do so in the wrong order, it is also up to TCP to (75) them into messages in the proper sequence.
(71)
● Each machine supporting TCP has a TCP transport entity, either a library procedure, a user process, or part of the kernel. In all case, it manages TCP streams and (71) to the IP layer. A TCP (72) accepts user data streams from local process, breaks them into pieces not exceeding 64KB, and sends each piece as a separate IP (73) . When datagrams containing TCP data arrive at a machine, they are given to the TCP entity, which reconstructs the original byte streams. The IP layer gives no guarantee that datagrams will be delivered properly, so it is up to TCP to time out and (74) them as need be. Datagrams do arrive may well do so in the wrong order, it is also up to TCP to (75) them into messages in the proper sequence.
(71)
● 网络用户能进行QQ聊天, 但在浏览器地址栏中输入www.ceiaec.org却不能正常访问该页面,此时管理员应检查 (70) 。
(70)
● SMTP 使用端口 (68) 传输邮件报文,报文采用 (69) 格式表示。
(68)
● 通常使用 (66)作为用户名进行匿名 FTP 访问。
(66)
● 下列Internet应用中,传输层需要采用UDP 协议的是 (67) 。
(67)
● 在 Linux 操作系统中,网络管理员可以通过修改 (64) 文件对 Web 服务器端口进行配置。
(64)
● 在Windows的cmd命令窗口中输入 (65) 命令,可以查看本机路由信息。
(65)
● 在Linux操作系统中, (63) 命令可以将文件备份到磁带上。
(63)
● 下面关于防火墙的说法,正确的是(62) 。
(62)
● Windows Server 2003的IIS 为WEB服务提供了各种选项,利用这些选项可以更好的配置 WEB 服务的性能、行为和安全等,其中“限制连接数”选项属于下图中的(59)选项卡。
(59)
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