In this lesson, I start the discussion of Class - C classful IP addresses.

Topics covered include,

a) Logic behind dividing an IP address into Network and Host parts.
b) First 24 bits (3 octets or bytes) denote the Network part and last 8 bits (1 octet or byte) denote the Host part.
c) With 24 bits allocated to denote Network, how many possible Class - C networks become available.
d) With 8 bits allocated to denote Hosts, how many possible hosts are available for each Class - C network.
e) Given an IP address, I explain the method for finding out the Network Address, broadcast address, IP address that can be assigned to first and last hosts.
f) Explain, 256 is the maximum number possible with 8 bits. And why we need to discount 2 from 256 possible values while calculating possible Host IP addresses.

After completing this tutorial, you will be
a) Given an IP address, you will be able to independently identify (i) the Network address for the given IP address, (ii) First valid host address, (iii) Last Valid host address (iv) Broadcast address for the Network.
b) Explain how a network address is derived by setting all of the Host bits to zero
c) Explain how a broadcast address is derived by setting all of the Host bits to one

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