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> "Design the fastest possible traceroute"

Hmm, I once took it upon myself to do exactly that (mostly using non-blocking sockets, skipping hostname lookups, etc.), but what's so "tricky" about this question? Assuming the position involved network programming, I'd consider it a good way to test someone's networking knowledge. Is the "tricky" part knowing how routers often drop ICMP replies if they exceed some threshold rate?




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