- sends and recvies routing msgs on it’s interface
- shares routing and msgs and info with the other routers using the same protocol
- routers exchange information about remote networks
- when router detects topology change the routing protol can advertise this change to other routers
- directly plugged in things have AD = 0 (administrative distance) and therfore always get picked bc it’s fastet (duh)
overview section on 6 describes this far better than the notes above page 13 also https://www.rfc-editor.org/rfc/rfc2328