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问题 单项选择题

下面程序执行后输出的结果是( )。
void main()
char x=0xddff,
printf("%d\n"，x);

A．-35
B．1
C．255
D．-8705

答案

参考答案：B

单项选择题

For (1) 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  (2) for every packet sent. Instead, when a connection is established, a route from the  (3) machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (4) .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  (5) telling which virtual circuit it belongs to.

空白（2）处应选择（）

A.processor

B.device

C.route

D.terminal
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单项选择题

计算机硬件中，没有（）。

A.控制器

B.存储器

C.输入/输出设备

D.文件夹
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