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Datasheet of 20-101-1194 - MODULE RABBITCORE RCM3309 ROHS
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6.2.1 IP Addresses Explained
IP (Internet Protocol) addresses are expressed as 4 decimal numbers separated by periods,
for example:
216.103.126.155
10.1.1.6
Each decimal number must be between 0 and 255. The total IP address is a 32-bit number
consisting of the 4 bytes expressed as shown above. A local network uses a group of adja-
cent IP addresses. There are always 2
called subnet mask) determines how many IP addresses belong to the local network. The
netmask is also a 32-bit address expressed in the same form as the IP address. An example
netmask is:
255.255.255.0
This netmask has 8 zero bits in the least significant portion, and this means that 2
addresses are a part of the local network. Applied to the IP address above (216.103.126.
155), this netmask would indicate that the following IP addresses belong to the local net-
work:
216.103.126.0
216.103.126.1
216.103.126.2
etc.
216.103.126.254
216.103.126.255
The lowest and highest address are reserved for special purposes. The lowest address
(216.102.126.0) is used to identify the local network. The highest address (216.102.126.
255) is used as a broadcast address. Usually one other address is used for the address of
the gateway out of the network. This leaves 256 - 3 = 253 available IP addresses for the
example given.
User's Manual
N
IP addresses in a local network. The netmask (also
8
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