Youtube and BBR

[Suryakanth Mohankumar]

Sir,

Where is the protocol used in youtube? I mean UDP is used for streaming. Then how come TCP BBR is used in youtube

[Scott Rosenberg]

BBR works on both udp quic and also tcp

On Tue, Oct 2, 2018, 9:19 AM Suryakanth Mohankumar <msk11...@gmail.com> wrote:

Sir,

Where is the protocol used in youtube? I mean UDP is used for streaming. Then how come TCP BBR is used in youtube

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[Neal Cardwell]

Yes. To add more detail, YouTube uses two transport protocols (depending on the transport protocol chosen by the client-side software): TCP, and QUIC. For this YouTube traffic, currently both TCP and QUIC traffic are using BBR congestion control. (And QUIC, in turn, runs on top of UDP.)

neal

[Bless, Roland (TM)]

Hi,

Am 02.10.2018 um 16:19 schrieb Suryakanth Mohankumar:
> Where is the protocol used in youtube? I mean UDP is used for streaming.
> Then how come TCP BBR is used in youtube

It depends on which kind of streaming. Interactive streaming
is typically using UDP as transport, whereas non-interactive
streaming often uses HTTP that mostly uses TCP as transport.
So YouTube uses currently either TCP or QUIC as transport protocols.
BBR can be used for both.

Regards
Roland