I know we can treat a lot of the technology we use as a black box, but not knowing even the basics of that technology indicates a lack of curiosity. I'd be shoc

I know we can treat a lot of the technology we use as a black box, but not knowing even the basics of that technology indicates a lack of curiosity. I'd be shocked to find a competent programmer who couldn't answer the question. A similar question: approximately how many IPv4 addresses are there? See also: "Latency Numbers Every Programmer Should Know"