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DES-7200 Configuration Guide Chapter 1 IP Address and Service
Configuration
1-2
8 16 24 32
Class C IP
address
1 1 0 Network ID Host ID
Class D: The highest four bits are 1110 and other bits are multicast IP address..
8 16 24 32
Class D IP
address
1 1 1 0 Multicast address
Note
An IP address whose highest four bits are 1111 is prohibited.
This type of IP address, also called Class E IP address, is
reserved.
When you build up a network, you should execute IP addressing according to
the real network environment. To make the network connect to the Internet, you
need apply for IP addresses from a central authority, for example, the China
Internet Network Information Center (CNNIC) in China. It is the Internet
Corporation for Assigned Names and Numbers (ICANN) that is responsible for
IP address allocation. However, a private network does not require the
application of IP addresses. It is recommended to assign private IP addresses
for them.
The following table lists those reserved and available addresses by class.
Class Address Range Status
0.0.0.0 Reserved
1.0.0.0 to 126.0.0.0 Available
Class A
127.0.0.0 Reserved
128.0.0.0 to191.254.0.0 Available
Class B
191.255.0.0 Reserved
192.0.0.0 Reserved
192.0.1.0 to 223.255.254.0 Available
Class C
223.255.255.0 Reserved
Class D 224.0.0.0 to 239.255.255.255 Available
240.0.0.0 to 255.255.255.254 Reserved
Class E
255.255.255.255 Multicast
There are three blocks of IP addresses reserved for private networks that are
not used in the Internet. Address translation is required for a private network