Identifying Network Classes - Novell NETWARE 6-DOCUMENTATION Manual

Figure 8 A Class C IP address
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Network
110
Address

Identifying Network Classes

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NetWare TCP/IP Administration Guide
The format of a Class C address is as follows:
110nnnnn.nnnnnnnn.nnnnnnnn.hhhhhhhh
where n represents the network address and h represents the host address.
Class C addresses contain 21 bits of network address and 8 bits of host
address.
Host Portion
The first byte of an IP address identifies which of the three network classes
that address belongs to. The ranges for that first byte are as follows:
Class A: 1 to 126 (1.h.h.h to 126.h.h.h)
Class B: 128 to 191 (128.n.h.h to 191.n.h.h)
Class C: 192 to 223 (192.n.n.h to 223.n.n.h)
An IP address beginning with 154 is a Class B address. The first two bytes of
the address are represented by n for the network portion of the address, and the
last two bytes are represented by h for the host portion. For example, an IP
address of 154.1.0.3 means the IP network portion is 154.1.0.0 and the host
portion on that network is #.#.0.3.
The network portion of an IP address should be the same for all nodes on that
network. Each node connected to the network must have a unique IP host
address assigned to it.
HINT:
The key to selecting a number for the host portion of the IP address is to
ensure that the number selected is unique, that is, that no other host on the network
has the same IP address.
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