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4760 The New, Encrypted Protocol Stack & how to deal with it

The transition of network traffic from TCP to QUIC is happening extremely fast with measurements across the world showing QUIC has already reached nearly 50% of total traffic, doubling approximately every 18 months. The new protocol stack, comprising QUIC, encrypted over UDP, HTTP/3, DNS over HTTP (DoH) and eSNI/ECH, all over TLS (Transport Layer Security) 1.3, completely obfuscates the traffic between application nodes and simultaneously drives a phenomenal change in traffic flow behaviour with applications now fully in control of how they get delivered to end-users, disintermediating the network in the process. Large Internet & Cloud players and many emerging application players are rapidly adopting the new protocol stack and traditional TCP/IP derived technologies, combined with L4+ monitoring techniques, are proving largely insufficient in keeping up with this evolution. Application detection and visibility is significantly impaired by this stack and the key technological paradigms on which communications service providers have built their network capabilities are now being challenged and obsoleted by these new protocols. In this session, we will show how the new protocol stack is constructed, how it behaves in terms of both visibility and congestion management, the impact it has on infrastructure elements including the RAN (Radio Access Network) - and not only - and an analysis of how much traffic it occupies today in mobile and fixed networks. In addition, we will discuss the techniques Communication service providers can use to evolve their network architecture and services capabilities to keep pace with this evolving protocol stack, enabling better traffic visibility, Quality of Experience and more efficient use of precious 5G spectrum. Speaker: Andreas Enotiadis