试题与答案

VLAN工作在OSI参考模型的 (35) 。不同VLAN之间的PC机通信时必须要借助

题型:单项选择题

题目:

VLAN工作在OSI参考模型的 (35) 。不同VLAN之间的PC机通信时必须要借助于具有 (36) 功能的网络设备。

A.第一层

B.第二层

C.第三层

D.高层

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A解析:[评析] static声明的外部变量只限于被本文件引用,而不能被其他文件引用。用static来声明一个变量的作用有:①对局部变量用static声明,则为该变量分配的空间在整个程序执行期间始终存在;②全...

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3. That air crash o___________ only a few minutes after the plane took off.

4. He felt very d___________ at not getting the job.

5. The play was good except that awkward leading actor. He s___________ the whole show.

6. I was very e___________ when my sister got drunk and said something silly in the party.

7. Frank was my c___________ at work. Everyone in our office liked him.

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