Rangos direcciones de red

Class A
Class A comprises networks 1.0.0.0 through 127.0.0.0. The network number is contained in the first
octet. Thisclass provides for a 24−bit host part, allowing roughly 1.6 million hosts per network.
Class B
Class B contains networks128.0.0.0 through 191.255.0.0; the network number is in the first two
octets. This class allows for 16,320 nets with 65,024 hostseach.
Class C
Class C networks range from 192.0.0.0 through 223.255.255.0, with the network number contained
in the firstthree octets. This class allows for nearly 2 million networks with up to 254 hosts.
Classes D, E, and F
Addresses falling intothe range of 224.0.0.0 through 254.0.0.0 are either experimental or are
reserved for special purpose use and don't specifyany network. IP Multicast, which is a service that
allows material to be transmitted to many points on an internet at one time,has been assigned
addresses from within this range.
If we go back to the example in Chapter 1, we find that 149.76.12.4,the address of quark, refers to host
12.4 on the class B network 149.76.0.0.
Table 2−1. IP Address Ranges Reserved for PrivateUse
Class Networks
A 10.0.0.0 through 10.255.255.255
B 172.16.0.0 through 172.31.0.0
C 192.168.0.0 through 192.168.255.0