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首頁 [2020/06/19 19:03]
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首頁 [2024/08/20 07:27] (目前版本)
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| ^ 60 ^ 3600 ^ 86400 ^ 604800 ^ 2592000 ^ 31536000 | | ^ 60 ^ 3600 ^ 86400 ^ 604800 ^ 2592000 ^ 31536000 | |
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| ^RFC1918 name ^IP address range ^number of addresses ^ largest CIDR block <html><br></html>(subnet mask) ^host id size ^mask bits ^ classful description<html><br></html>[Note 1]| | ^RFC1918 name ^ Network # ^IP address range ^ Broadcast ^number of addresses ^ largest CIDR block <html><br></html>(subnet mask) ^host id size ^mask bits ^ classful description<html><br></html>[Note 1]| |
| | 24-bit block | 10.0.0.0 – <html><br></html>10.255.255.255 | 16777216 | 10.0.0.0/8 <html><br></html>(255.0.0.0) |24 bits |8 bits |single <html><br></html>class A network| | | 24-bit block | 10.0.0.0 | 10.0.0.1 – <html><br></html>10.255.255.254 | 10.255.255.255 | 16777216 | 10.0.0.0/8 <html><br></html>(255.0.0.0) |24 bits |8 bits |single <html><br></html>class A network| |
| | 20-bit block | 172.16.0.0 – <html><br></html>172.31.255.255 | 1048576 | 172.16.0.0/12 <html><br></html>(255.240.0.0) | 20 bits |12 bits |16 contiguous <html><br></html>class B networks| | | 20-bit block | 172.16.0.0 | 172.16.0.1 – <html><br></html>172.31.255.254 | 172.31.255.255 | 1048576 | 172.16.0.0/12 <html><br></html>(255.240.0.0) | 20 bits |12 bits |16 contiguous <html><br></html>class B networks| |
| | 16-bit block | 192.168.0.0 – <html><br></html>192.168.255.255 | 65536 | 192.168.0.0/16 <html><br></html>(255.255.0.0) | 16 bits |16 bits |256 contiguous <html><br></html>class C networks | | | 16-bit block | 192.168.0.0 | 192.168.0.1 – <html><br></html>192.168.255.254 | 192.168.255.255 | 65536 | 192.168.0.0/16 <html><br></html>(255.255.0.0) | 16 bits |16 bits |256 contiguous <html><br></html>class C networks | |
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| | ====== Subnet Mask Cheat Sheet ====== |
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| |/9 |8388608 |8388606 |255.128.0.0 |32768| | |/9 |8388608 |8388606 |255.128.0.0 |32768| |
| |/8 |16777216 |16777214 |255.0.0.0 |65536| | |/8 |16777216 |16777214 |255.0.0.0 |65536| |
| <html> | |
| <body> | |
| <h1>Subnet Mask Cheat Sheet</h1><hr /> | |
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| <table class="chart"> | |
| <tr><th> </th><th>Addresses</th><th>Hosts</th><th>Netmask</th><th>Amount of a Class C</th></tr> | |
| <tr align="center"><th>/30</th><td>4</td><td>2</td><td>255.255.255.252</td><td>1/64</td></tr> | |
| <tr align="center"><th>/29</th><td>8</td><td>6</td><td>255.255.255.248</td><td>1/32</td></tr> | |
| <tr align="center"><th>/28</th><td>16</td><td>14</td><td>255.255.255.240</td><td>1/16</td></tr> | |
| <tr align="center"><th>/27</th><td>32</td><td>30</td><td>255.255.255.224</td><td>1/8</td></tr> | |
| <tr align="center"><th>/26</th><td>64</td><td>62</td><td>255.255.255.192</td><td>1/4</td></tr> | |
| <tr align="center"><th>/25</th><td>128</td><td>126</td><td>255.255.255.128</td><td>1/2</td></tr> | |
| <tr align="center"><th>/24</th><td>256</td><td>254</td><td>255.255.255.0</td><td>1</td></tr> | |
| <tr align="center"><th>/23</th><td>512</td><td>510</td><td>255.255.254.0</td><td>2</td></tr> | |
| <tr align="center"><th>/22</th><td>1024</td><td>1022</td><td>255.255.252.0</td><td>4</td></tr> | |
| <tr align="center"><th>/21</th><td>2048</td><td>2046</td><td>255.255.248.0</td><td>8</td></tr> | |
| <tr align="center"><th>/20</th><td>4096</td><td>4094</td><td>255.255.240.0</td><td>16</td></tr> | |
| <tr align="center"><th>/19</th><td>8192</td><td>8190</td><td>255.255.224.0</td><td>32</td></tr> | |
| <tr align="center"><th>/18</th><td>16384</td><td>16382</td><td>255.255.192.0</td><td>64</td></tr> | |
| <tr align="center"><th>/17</th><td>32768</td><td>32766</td><td>255.255.128.0</td><td>128</td></tr> | |
| <tr align="center"><th>/16</th><td>65536</td><td>65534</td><td>255.255.0.0</td><td>256</td></tr> | |
| </table> | |
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| <p></p> | |
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| </html> | |
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