Xante PlateMaker 3, Руководство пользователя

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5-24 Ethernet Setup bb ______________________________________
The class B address is used for networks with more than 256 (2
8
), but
less than 65,536 (2
16
) workstations. The first 16 bits identify the
network. The remaining 16 bits are used as host IDs. The class B
address begins with the numbers 128 through 191.
The class C address is used for networks with less than 256 (2 8 )
workstations. The first 24 bits identify the network. The remaining 8
bits are used as host IDs. The class C address begins with the
numbers 192 through 254.
Note: The actual number of usable host IDs is smaller than the
calculated number listed above, because some addresses are
reserved, by convention, for specific uses. See the list in the
next section, “Reserved IP Addresses.”
Reserved IP Addresses
Addresses in the following table are reserved, by convention, and
should not be used as a device address.
Reserved IP Addresses
Net ID Host ID Meaning
all 0’s all 0’s This host
all 0’s host ID A host on this network
all 1’sall 1’s Limited broadcas t (local network)
net ID all 1’s Directed broadcast (network specific)
net ID all 0’sNetwork addres s
127 anything Loopback address
(should never appear on a network)
Addresses not shown in the preceding table should be valid, as long
as they identify the host within the given network. See your System
Supervisor for the correct address to use.