Last time our server pretty much worked!
	Weird

nc is not a very good client
	Mostly because it doesn't separate keyboard input from incoming data
	Fixing this is weirdly hard, but we'll do it eventually

Binary Data!
	We could send numbers as text, but this is inefficient
		There are text-based protocols out there
		A lot of time they're used with data compression
	Most protocols send fixed-size numbers
		Especially lower-level protocols
		IP header, etc

A server that adds up numbers
	It can support multiple clients at once, but doesn't really have to
	It'll reply with the total so far

Strings in this model:
	Can be fixed-size
	Or we can send the length first
	Could use a null terminator, but this is uncommon in this model

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