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Écrit par CCNA
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26-05-2008 |
- IP addresses = 4 bytes/32 bits = network part + host part
- IP classes
| Class |
Range |
Diff. |
Nw bytes |
Ho bytes |
Network size |
Notation |
| A |
1-126 |
- |
1 |
3 |
big |
/8 |
| B |
128-191 |
+127 |
2 |
2 |
medium |
/16 |
| C |
192-223 |
+64 |
3 |
1 |
small |
/32 |
| D |
224-239 |
+32 |
- |
- |
muticast |
- |
| E |
240-255 |
+16 |
- |
- |
testing |
- |
- IP diagrams per class
| A- class
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| B- class |
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| C- class
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- Classful address : follows the class rule (/8,/16,/24)
- Classless address : doesn't follow the class rule (--> subnetting)
- Loopback : 127.0.0.0 (used for TCP/IP connectivity check)
- Network ID : network part = network bits / host part = all bits at 0 [C class example : 192.168.1.0/24]
- Broadcast ID : network part = network bits / host part = all bits at 1 [C class example : 192.168.1.255]
- Netmask : networkpart = all bits at 1 / host part = all bits at 0 [C class example : 255.255.255.0]
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Dernière mise à jour : ( 07-06-2008 )
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Cisco CCNA (English)