计算机网络-根据掩码和ip计算网段起始ip和最终ip

April 23, 2018

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<p>一个B类ip<br />ip：10.254.68.136<br />掩码：255.255.224.0</p>
<p></p>
<table border="1">
<tbody>
<tr>
<th><span style="color: green;">网络位</span></th>
<th><span style="color: red;">主机位</span></th>
</tr>
</tbody>
</table>
<p> <br />掩码二进制：</p>
<table border="1">
<tbody>
<tr>
<th><span style="color: green;">1111 1111</span></th>
<th><span style="color: green;">1111 1111</span></th>
<th><span style="color: green;">111</span><span style="color: red;">0 0000</span></th>
<th><span style="color: red;">0000 0000</span></th>
</tr>
</tbody>
</table>
<p>掩码中0为主机位，1为网络位</p>
<p> <br />ip二进制：</p>
<table border="1">
<tbody>
<tr>
<th><span style="color: green;">0000 1010</span></th>
<th><span style="color: green;">1111 1110</span></th>
<th><span style="color: green;">010</span><span style="color: red;">0 0100</span></th>
<th><span style="color: red;">1000 1000</span></th>
</tr>
</tbody>
</table>
<p> <br />网段网络位不动，主机位从0到1，所以该网段起始ip为：</p>
<table border="1">
<tbody>
<tr>
<th>10</th>
<th>254</th>
<th>64</th>
<th>0</th>
</tr>
<tr>
<th><span style="color: green;">0000 1010</span></th>
<th><span style="color: green;">1111 1110</span></th>
<th><span style="color: green;">010</span><span style="color: red;">0 0000</span></th>
<th><span style="color: red;">0000 0000</span></th>
</tr>
</tbody>
</table>
<p>最终ip为：</p>
<table border="1">
<tbody>
<tr>
<th>10</th>
<th>254</th>
<th>95</th>
<th>255</th>
</tr>
<tr>
<th><span style="color: green;">0000 1010</span></th>
<th><span style="color: green;">1111 1110</span></th>
<th><span style="color: green;">010</span><span style="color: red;">1 1111</span></th>
<th><span style="color: red;">1111 1111</span></th>
</tr>
</tbody>
</table>
!!!

Last modification：October 24, 2019