问题 填空题

网桥可以在互联的多个局域网之间实现数据接收、地址______与数据转发功能。

答案

参考答案:过滤

解析: 本题考查网桥的概念,属于考试重点内容,考生应该理解其与路由器、网关等的异同点。网桥是用以扩展局域网的硬件设备,是在数据链路层上实现不同网络的互联设备,常用于互联两个局域网。网桥在网络互联中起数据接收、地址过滤和数据转发的作用,用来实现多个网络系统之间的数据交换。用网桥实现数据链路层互联时,互联网络的数据链路层与物理层协议可以是相同的,也可以是不同的。

改错题
 
短文改错。
      
     Not too long ago, people can't go scuba diving on
Hainan Island, or anywhere else. This were because  
there was no machine allowing  person to breathe    
under water for long time. In 1943 Jacques
Cousteau and his friend made it possible by invent the scuba    
machine. Cousteau was very interested on diving        
deep into the sea, but wanted to be an explorer. He    
bought a ship and used them to explore under the sea.
He also was liked to make videos. As he explored
the sea, he took pictures and videos of many thing that  
people had never seen before.  
1.                                                
2.                                                
3.                                                
4.                                                
5.                                                
6.                                                
7.                                                
8.                                                
9.                                                
10.                                              
单项选择题