下给出的地址中，属于子网l92．168．15．19／28的主机地址是()。
- A.192.168.15.17
- B.192.168.15.14
- C.192.168.15.16
- D.192.168.15.31
正确答案及解析
正确答案
解析
本题是一个子网划分的题目。
题干中192．168．15．19／28的子网掩码是255．255．255．240。用192．168．15．19与255．255．255．240发生与运算得到192．168．15．16／28的网络ID，在此网络ID下有效的主机IP地址是192．168．15．17／28192．168．15．30／28。显然192．168．15．17属于这个子网。只有A符合答案。B不在其网络ID范围内，C是网络地址，D是该网络ID下的广播地址。
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