System information

SIGNAMAX a.s.
Seat: Palackeho trida 38, 612 00 Brno, CZ l Office: Vlarska 22, P. O. Box 214, 658 14 Brno, CZ
T:[phone] l F:[phone] l www.signamax.eu
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Class A:
Address is less than 126.255.255.255. There are a total of 126 networks can be
defined because the address 0.0.0.0 is reserved for default route and 127.0.0.0/8 is reserved
for loopback function.
0
Class B:
IP address range between 128.0.0.0 and 191.255.255.255. Each class B network has
a 16-bit network prefix followed 16-bit host address. There are 16,384 (2^14)/16 networks
able to be defined with a maximum of 65534 (2^16 –2) hosts per network.
10
Class C:
IP address range between 192.0.0.0 and 223.255.255.255. Each class C network has
a 24-bit network prefix followed 8-bit host address. There are 2,097,152 (2^21)/24 networks
able to be defined with a maximum of 254 (2^8 –2) hosts per network.
110
Class D and E:
Class D is a class with first 4 MSB (Most significance bit) set to 1-1-1-0 and is used for
IP Multicast. See also RFC 1112. Class E is a class with first 4 MSB set to 1-1-1-1 and is
used for IP broadcast.
According to IANA (Internet Assigned Numbers Authority), there are three specific IP
address blocks reserved and able to be used for extending internal network. We call it Private
IP address and list below:
Class A 10.0.0.0 --- 10.255.255.255
Class B 172.16.0.0 --- 172.31.255.255
Class C 192.168.0.0 --- 192.168.255.255
Please refer to RFC 1597 and RFC 1466 for more information.
Bit # 0 1 7 8 31
N
etwork address Host address
Bit # 01 2 15 16 31
Network address Host address
Bit # 0 1 2 3 23 24 31
Network address Host address