Networking is defined as connectivity between peers inside network and outside network.Inside network connectivity in Networking topology is known as Lan and outside Network connectivity is called as WAN.Lan Is defined as Local Area Network between peer systems and Wan is defined as Wide Area Network between Lan to a Lan in different Location and this connectivity of lan in different locations is defined as WAN.Networking is depends on OSI layer which is defined as OPen System Internetworking.In OSI Layer data is reached to destination from source passing all the 7 LAYERS of OSI layer and these 7 layers were on EITHER side of network and they are defined as 

1. Presentation Layer
2. Data-link Layer
3. Network Layer
4. Transport Layer
5. SESSION Layer 
6. PHYSICAL Layer 
7. Application Layer

Networking is defined as connectivity between peers inside network and outside network.Inside network connectivity in Networking topology is known as Lan and outside Network connectivity is called as WAN.Lan Is defined as Local Area Network between peer systems and Wan is defined as Wide Area Network between Lan to a Lan in different Location and this connectivity of lan in different locations is defined as WAN.Networking is depends on OSI layer which is defined as OPen System Internetworking.In OSI Layer data is reached to destination from source passing all the 7 layers of OSI layer and these 7 layers were on either side of network and they are defined as