Configuration Manual Owner manual

Publication 1757-PM002A-EN-E - June 2006
Set Up A System 2-21
binary number is important because it will determine which class of network
the IP address belongs to.
An IP address consists of two parts, one identifying the network and one
identifying the node, or host. The class of the address determines which part
belongs to the network address and which part belongs to the node address.
All nodes on a given network share the same network prefix, but must have a
unique host number.
Class A Network: Binary addresses start with 0, therefore the decimal
number can be anywhere from 1 to 126. The first 8 bits (the first octet)
identify the network and the remaining 24 bits indicate the host within
the network.
An example of a Class A IP address is 102.168.212.226, where "102"
identifies the network and "168.212.226" identifies the host on that
network.
Class B Network: Binary addresses start with 10, therefore the decimal
number can be anywhere from 128 to 191. (The number 127 is reserved
for loopback and is used for internal testing on the local machine.) The
first 16 bits (the first two octets) identify the network and the remaining
16 bits indicate the host within the network.
An example of a Class B IP address is 168.212.226.204, where "168.212"
identifies the network and "226.204" identifies the host on that network.
Class C Network: Binary addresses start with 110, therefore the
decimal number can be anywhere from 192 to 223. The first 24 bits (the
first three octets) identify the network and the remaining 8 bits indicate
the host within the network.
An example of a Class C IP address is 200.168.212.226, where
"200.168.212" identifies the network and "226" identifies the host on
that network.
Class D Network: Binary addresses start with 1110, therefore the
decimal number can be anywhere from 224 to 239.
Class D networks are used to support multicasting.
Class E Network: Binary addresses start with 1111, therefore the
decimal number can be anywhere from 240 to 255.
Class E networks are used for experimentation. They have never been
documented or utilized in a standard way
.