This week, we looked at how Data Center Networks are a special case of the general internet, which permits certain simplifications of how things can be done due to regular topology and more cooperative environment, so either known or controllable traffic matrix and source behaviours.
Optimisation is a lens through which to look at design. Network protocols - routing and congestion control - can be seen as online solutions to the joint network/user/traffic optimisation problem. Use resource as efficiently as possible to maximise power of net (e.g. minimise delay) and mazimise rates of users subject to fairness.
MPTCP - optimisation never said anything that restricted us to single routes.
QUIC - we talked about equation based control derived for TCP - can we simplify protocols for lower latency and less head-of-line blocking for browser/server interaction in the web, and keep compatibility with TCP - answer, QUIC...(work-in-progress).
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