170.170.10.1
170.170.11.1
While IGP's work to Route packets inside an Autonomous System EGP's (Exterior Gateway Protocols) do the routing Outside the Autonomous Systems
Layer 3
170.170.12.1
170.170.13.1
170.170.0.0
170.170.0.4
170.180.0.0
170.180.0.4
170.180.10.1
170.180.11.1
170.180.13.1
170.180.12.1
11.24.0.4
14.24.0.4
Autonomous System
Autonomous System
IGP
IGP
EGP
The main EGP protocol is BGP – (Border Gateway Protocol)