How does the link local Fe80 work? i am reading odem Wendel official cert guild and I'm straight up confused  on how it routes packets with link local?do host use the link-local address only when in there subnet ?link-local packets are not routed out...

do you need a ip address for the switches on a router on stick ?sub-interface g0/0.10 192.168.1.1 255.255.255.0and on switch is vlan 10 192.168.1.2 255.255.255.0does it need a ip address on vlan 10 ?  

can i use CML2 to learn python? i ask because i hate using GNS3.