Subnet

1.

A

 part of 

a

 network, which has the same network 

address

 as other parts of the 

network

 but 

a

 unique 

subnet

 number; 

a

 subdivisional 

network

 interconnected 

and

 situated within 

a

 larger 

network

.2.Within the ISO/OSI reference model, the layers below the 

transport layer

 are referred to 

a

 the 

subnet

.They consist of the 

network

, 

data

 link, 

and

 physical layers.