[cisco网络配置]Cisco试题:网络中广播地址
【shitiku.jxxyjl.com--思科试题】
原题:  
the following exhibit shows the  wan. study it carefully:  
what are the broadcast addresses of the subnets in the pcjob network? (select three options.)  
a. 172.16.82.255  
b. 172.16.95.255  
c. 172.16.64.255  
d. 172.16.32.255  
e. 172.16.47.255  
f. 172.16.79.255  
上述ip地址中,哪个是pcjob网络的广播地址?  
题解:  
  又是一道关于ip地址的题目,首先回顾一下什么才是ip地址:广播地址由ip地址网络前缀加上全1主机后缀组成,如:192.168.1.255是192.169.1.0这个网络的广播地址;130.168.255.255是130.168.0.0这个网络的广播地址。  
  现在问的是pcjob网络中的广播地址,看一下图,发现这个网络里有三个网段,而且题目也要求选出三个广播地址,那就一个一个来咯。  
  172.16.32.0/20网段广播地址:172.16.47.255  
  172.16.64.0/20网段广播地址:172.16.79.255  
  172.16.82.90/20网段广播地址:172.16.95.255  
正确答案:bef
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