1. IP Address Classes Class A N.H.H.H 1-126 0 can not be used as Net ID
127 is reserved for loop back functions
126 Different Networks
Hosts per Network

2. IP Address Classes Class B N.N.H.H 128-191
The first IP Address is the NET ID
The last IP Address is the Broadcast Address
Different Networks
65543 Hosts per Network

3. IP Address Classes Class C N.N.N.H 192-223
The first IP Address is the NET ID
The last IP Address is the Broadcast Address
Different Networks
254 Hosts per Network

4. IP Address Classes CLASS D – Used for multicast broadcasts
CLASS E – Experimental addresses not available to the public

5. SUBNET MASKING Default Subnet Mask Smaller broadcast domains
More manageable networks
Save IP Addresses
Default Subnet Mask
CLASS A
CLASS B
CLASS C

6. SUBNET MASKING 4000 Hosts NET ID – 190.100.0.0 CLASS B 212=4096
D.S.M
is the Subnet
= 16

7. SUBNET MASKING Subnet Mask is 255.255.240.0
……………….
Net ID
Broadcast

8. 500 Hosts
NET ID – 

9. Private Addresses
There are certain address in each class that are not assigned. These are called private addresses.
Private addresses are not routed on the internet.
Network Address Translation (NAT) can be used to connect these Private Networks to the Internet