I know, I know what you're thinking, you're really chomping at the bit to get to subletting, but
before we talk about it, it's better to learn the IB classes and the subnet masks first.
Right?
Octets of the IP address are broken down to provide an addressing scheme that can accommodate large
and small networks.
So they're basically five different classes of networks and they range from A to E.
We're going to focus on classis A, B and C, which provide unicast addresses for networks of three
different network sizes, Class D is for multicast networking and the classi address ranges reserved
for future or experimental purposes.
So given an IP address, its class can be determined from the three high order bits and by that I mean
the three leftmost bit in the first octet.
In a class I address, the first octet is a network portion, so Class AA has a major network address
of one that zero zero zero all the way through one to seven 255, 255 255.
The next 24 bits are for the network manager to divide into subnets and hosts as he or she sees fit.
Class addresses are used for networks that are more than sixty five thousand five hundred and thirty
six hosts.
In a Class B address, the first two octets are the network portion, so Class B has a major network
address of one two eight zero zero zero all the way through one nine one two five 5.2 555 Datu five
five.
Octets, three and four, that means 16 bit are for local subnets and hosts.
Class IP addresses are used for networks that have between 256 and sixty five thousand five hundred
thirty four hosts.
And finally, in a classy address, the first three octets are the network portion.
Class C has a major network address of one nine two zero zero zero all the way through two to three
to five 5.5 5.2 five five octet for eight bits is for local subnets and hosts perfect for networks with
less than two hundred and fifty four hosts.