Evolution of the IP Model
這篇提到的網路設計的誤區, 下面是再提醒自己的要點(或是現在很有感覺的要點)
Claim: Reachability is symmetric (*****)
Claim: Multicast/broadcast is less expensive than replicated unicast
Claim: The end-to-end latency of the first
packet to a destination is typical
Claim: Reordering is rare
Claim: Loss is rare and probabilistic, not deterministic
Claim: An end-to-end path exists at a single point in time
Claim: A host has only one address on one interface
Claim: An address used by an application is the same as the address used for routing
Claim: Packets are unmodified in transit
Claim: Source addresses are not forged
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