I sometimes use a basic system monitor which has the ability to display a networking graph and subsequent upload/download. Testing without javascript enabled, I open a website and wait for it to load. I notice that, even long after the website completely loads all of its content, there are always some small bits of data (usually in the byte and kilobytes range) that are sent and received for the remainder of the DNS request before it expires (the amount varies depending on the website and usually spikes right before the DNS request expires).
So I'm curious, what are these small bits of data that are being sent and received as it relates to networking/DNS in general?
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