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xiaoshe 发表于 2007-4-7 09:42

求助

5: the address 172.16.208.16/20 is a host address in which of the following subnets?

　　a. 172.16.176.0–255.255.240.0

　　b. 172.16.192.0–255.255.240.0

　　c. 172.16.208.0–255.255.240.0

　　d. 172.16.224.0–255.255.240.0

6: you are designing an ip address scheme for your brand new remote office. the vice president of it calls to tell you that you will be in charge of the 192.168.1.64/26 subnetwork. this supplies you with a single subnetwork with 62 hosts. you need to have at least two subnets with 14 hosts in each subnet. what custom subnet mask should you use?  


　　a. 255.255.255.128

　　b. 255.255.255.192

　　c. 255.255.255.224

　　d. 255.255.255.240

　　e. 255.255.255.248

这两道题的答案到底是什么呢？又一点迷惑,先谢谢了啊

醋溜面包 发表于 2007-4-7 11:29

第一道答案：c
子网掩码为255.255.240.0得一个子网为16个IP(256-240＝16)
第二道答案：d
192.168.1.64/26得有26位掩码(11111111.11111111.11111111.11000000),最后一段自然就是240了
好久没做这样的题了，答案仅供参考哦
呵呵:lol

xiaoshe 发表于 2007-4-7 12:13

回复 #2 醋溜面包 的帖子

谢谢斑竹，但我个人觉得第二道题C答案好像也可以，因为题的意思是叫把子网192.168.1.64/26分成至少再分成两个子网，每个子网至少得有14个主机，所以应该也可以。还望多多指点哦

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