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always be pinged from a local node because it forms a
loopback and points back to the same node.
Class D addresses are reserved for multicasting.
Class E Addresses are reserved for future use. They are not
used for node addresses.
The part of the IP address that belongs to the network is the
part that is 'hidden' by the '1's in the subnet mask. This can
be seen below:
•
Class A
•
Class B
•
Class C
For example, the IP address 10.42.73.210 is a Class A
address, so the Network part of the address (called the
Network Address) is the first octet (10.x.x.x). The node part
of the address is the last three octets (x.42.73.210).
To specify the network address for a given IP address, the
node part is set to all "0"s. In our example, 10.0.0.0
specifies the network address for 10.42.73.210. When the
node part is set to all "1"s, the address specifies a broadcast
address. So, 10.255.255.255 is the broadcast address for
the network 10.0.0.0.
Subnet Masking
A subnet mask can be applied to an IP address to identify
the network and the node parts of the address. A bitwise
logical AND operation between the IP address and the
subnet mask results in the Network Address.
For example:
00001010.00101010.01001001.11010010
Class A IP address
9033691-01
NETWORK.node.node.node
NETWORK.NETWORK.node.node
NETWORK.NETWORK.NETWORK.node
VH-2402-L3 Management Guide 139
10.42.73.210
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