1 | ES-IS |
2 | ISO 9542 specification |
3 | defines how hosts (ESs) and routers (ISs) learn about each other ( configuration process) |
4 | it is a "discovery" protocol ( ES hello messages and IS hello messages) |
5 | 3 types of sub-networks: point-to-point (like WAN serial), broadcast (like Ethernet), general topology (like X.25) |