The ICND2 exam asks for knowledge about Routing protocols and their Default Administrative distances. The following table below should be burned into your brain before taking the exam i would imagine.
An Administrative Distance is used so a router can make a decision on how believable the route is as reported by the corresponding routing protocols. Learn this and in the coming days we will use this to configure and Verify both flavours of OSPF and EIGRP.
| Route | Administrative Distance |
| Connected | 0 |
| Static | 1 |
| BGP (External Routes) | 20 |
| EIGRP (Internal Routes) | 90 |
| IGRP | 100 |
| OSPF | 110 |
| IS-IS | 115 |
| RIP | 120 |
| EIGRP (External Routes) | 170 |
| BGP (Internal Routes) | 200 |
| Unusable | 255 |