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For each blank, choose the best answer from the four choices and write down on the answer sheet. (71) is a channel’ s capacity which directly reflects the data transfer rate of the channel. (72) functions in a NetWare network which is used to define addressing schemes. (73) is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains. (74) is the popular LAN developed under the direction of the IEEE802.3. (75) is a device which enables digital microcomputers to communicate across analog telephone lines.

A. The repeater
B. The modem
C. The hub
D. The printer

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In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet. Heterogeneous network environments consist of computer systems from (66) vendors that run (67) operating systems and communication protocols. An organization that (68) its computer resources is usually (69) the task of integrating its heterogeneous systems. Typically, each deparlment or division has defined its own network needs (70) OS, LAN topology, communication protocols, applications, and other components.

A. faced on
B. faced with
C. faced about
D. faced up to

关于UDP协议的说法正确的是 (27) 。

A. UDP协议是网络层协议
B. UDP协议使用IP地址在机器之间传送报文
C. UDP协议提供了不可靠的面向连接的传输服务
D. UDP协议提供了可靠的无连接的传输服务

Why was the Ladakhi culture damaged

A. Because India and China fought there
Because it becomes dependent on the import
C. Because the Indian government regarded this region as the front in war
D. Because the developing ways introduced are against the realities there

若Web站点基于IIS建设,而且Web站点内容位于NTFS分区时,有4种方法可以限制用户的访问权限。下列不是限制用户的访问权限的方法是 (46) 。

A. URL限制
B. 用户验证
C. Web权限
D. NTFS权限

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