Routing Protocol
Interior Gateway Protocols (IGP)
Used inside a Autonomous System
| Abbreviation | Name | Notes |
|---|---|---|
| OSPF | Open Shortest Path First | Most commonly used, IP layer |
| IS-IS | Intermediate System to Intermediate System | Link layer |
| EIGRP | Enhanced Interior Gateway Routing Protocol | Cisco semi-proprietary |
| RIP | Routing Information Protocol | Old, rarely used |
Routing Tables
The goal of the routing protocols we talked about above is to help routers across the Internet build their routing tables.