CEF optimizes route processing. Improves performance.
Fast switching and route caching FIB table next hop IP info
Unicast 0.0.0.0 – 220.127.116.11
Multicast 18.104.22.168 – 22.214.171.124
Out of Order Packets.
TCP has preventative measures like sequencing and re-transmission.
Asymmetrical Routing may have issues if mtu is different and if it is not identical.
ICMP unreachable – generated by a router to inform source host that it receives packet that destination is unreachable.
ICMP redirects – generated by a router to inform source host that it should send packets to another router to improve performance
TCP Latency – time delay required for info to travel accross network
Windowing amount of unacknowledged data that can be transmitted.