CEF optimizes route processing. Improves performance.
Fast switching and route caching FIB table next hop IP info
Unicast 0.0.0.0 – 126.96.36.199
Multicast 188.8.131.52 – 184.108.40.206
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.