某C类网络进行子网划分，子网号长度4位。若某子网号为1010（二进制数）子网中某一节点主机号为11（十进制数），则该节点IP地址中最后一个字节为______。
- A.196
- B.171
- C.110
- D.11
正确答案及解析
正确答案
解析
本题考查TCP/IP协议知识。在IPv4中，将IP地址分为A、B、C、D、E五类，采用32位二进制数表示。其中，标准C类网络采用24位网络号+8位主机号构成，在划分子网时，可将8位主机号一部分(高位)作为网络号，其余部分作为主机号。根据题目描述，主机号为十进制11，转为二进制是1011，所以该IP地址最后一个字节为高位网络号+低位主机号为10101011，即十进制171。
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