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User Manual
Aolynk DR814Q ADSL2+ Broadband Router
The starting part of every IP address i
length of the network ID d
"Clas
ses of IP
T
able 9-1 S
Class
Class A
Class B
Class C
The following are some valid IP address examples:
Class A: 10.30.6.125 (network ID = 10, host ID= 30.6.125)
Class B: 129.88.16.49 (netwo
Class C: 192.60.201.11 (network ID = 192.60.201, host ID = 11)
9.1.2 Classes of IP Addresses
Three common IP addresses are of Cass A, B, and C. (Class D is for special use and is
beyond the scope of this discussion.) These classes have different uses and
characteristics.
The class A network is the largest on the Internet. This allows at least 16 million
per network. Such 126 class A networks can hold at least two billion PCs. These
enormous networks are quite suitable for the LAN or Internet fundamental
organizations such as Internet service provider (ISP).
The class B network is relatively smaller than the class A network, but it still allows
16,384 class B networks and 65,000 hosts in each class B network. This kind of
network is suitable for the large organization
The class C network is the smallest one. It allows o
cla
ss
C networks and 254 hosts in each class C network. The LANs connecting to the
Inter
net are usua
Follo
wing are the key points about the IP ad
The easiest way to determine the class of
the field 1:
Class A: The number is from 1 to 126.
Class B: The number is from 128 to 191.
Class C: The
(The numbers for special use are not given here.)
epen
ds on the cla
es"). Tabl
e 9-1 d
Address
tructure
of the IP ad
dress
Field 1
Network ID
Network ID
Network ID
rk ID = 129.88, host ID = 16.49)
lly of this class networks.
number is from 192 to 223.
9 Appendix – IP Address and Subnet Mask
s the network ID and the rest is the host Dither
ss of th
e network (refer to sectio
escribes the
structure of the IP ad
Field 2
Host ID
Host ID
s such as enterprises and governments.
ver two million (2,097,152 exactly)
dress:
an IP address is to look at its number in
71
n 9.1.2
dress.
Field 3
Field 4
Host ID
hosts
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