20111107
3.1.3 dynamic vs static routing
3.2.1 routing protocols classification
3.2.4 Classful routing protocols do not send subnet mask information in routing updates. RIP and IGRP
3.2.5 convergence   slow: RIP, RIPv2 and IGRP
3.3.1 metric: lower is better
3.3.2 Hop count, bandwidth, load, delay, reliability, cost
3.4.1 Purpose of administrative distance
3.4.2 AD table
3.5.1 practice

4.1.2 Distance Vector: periodic updates, neighbors, broadcast updates, entire routing database
 Routers using distance vector routing are not aware of the network topology.
4.1.4 practice reset
4.3.1 RIP = every 30 seconds;  [IGRP = 90 seconds]
	RIP: invalid 180, flush 240, holddown timer 180
4.3.2 EIGRP: non-periodic, partial updates, bounded to AS number  (more in chap 9)
4.3.3 triggered updates -- when there is a topology change
	interface state changes
	unreachable state changes
	new route is installed in the routing table
4.3.4 random delay of update 
4.5.1 practice