Re: [tcpm] Lars Eggert's Discuss on draft-ietf-tcpm-2140bis-10: (with DISCUSS and COMMENT)

Joseph Touch <> Mon, 29 March 2021 20:15 UTC

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From: Joseph Touch <>
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Date: Mon, 29 Mar 2021 13:15:08 -0700
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To: Lars Eggert <>
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Subject: Re: [tcpm] Lars Eggert's Discuss on draft-ietf-tcpm-2140bis-10: (with DISCUSS and COMMENT)
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> On Mar 28, 2021, at 11:23 PM, Lars Eggert <> wrote:
>>> The modern web is using a lot fewer parallel connections compared to the web at
>>> the time RFC 2140 was written. So the example is slightly dated.
>> Can you clarify? All modern browsers are configured to allow 8-10 parallel connections, which is actually higher than when 2140 was written (it was half that).
> With H2 and H3, all all Chrome-based browsers and Firefox use a default of one connection per server. With H1, the default of those browsers seems to be six. But H2/H3 are 3/4 of all traffic by some measures (e.g., <>). So I stand by my argument.

Agreed, but I would note that:

	- the compartmentalization of the Internet means that we don’t know if we’re seeing an accurate representation
		CDNs hide traffic from many network taps
	- although chrome and Firefox may do this, they’re not the only browsers and web traffic isn’t the only TCP traffic
		Netflix and Amazon Prime both use TCP too; I’d bet they are a LOT more traffic (and Netflix uses multiple connections for a single stream)

I’ll update this to address both points.