Chapter 15: Appendix
[3] Physical implementations of an
There are five physical implementations of an Ethernet network that support a 10M bps data transfer speed. They are 10BASE5, 10BASE2,
The
[4] IP addresses on the
In order to identify one communication device among lots of devices connected to an Ethernet network, the
An IP address consists of one part that identifies the network to which the device is connected, and a unique device address. Depending on the size of the network, a network can be classified as one of three classes: A, B, and C. (For special use, class D and E are also available.)
Classes of IP address
| Top octet value | Network address section | Device address section | ||||
Class A | 0 to 127 |
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| xxx.xxx.xxx.xxx | Xxx.xxx.xxx.xxx |
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Class B | 128 to 191 |
| xxx.xxx.xxx.xxx | Xxx.xxx.xxx.xxx |
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Class C | 192 to 223 |
| xxx.xxx.xxx.xxx | Xxx.xxx.xxx.xxx |
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(Note: The gray digits are respective addresses.)
In a network, the IP address of all the communicating devices connected to this network will have the same network address. They should each have a unique device address.
The default value for the
Network address | Device address |
Fixed
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