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A First Look at QUIC in the Wild

Part of the Lecture Notes in Computer Science book series (LNCCN,volume 10771)


For the first time since the establishment of TCP and UDP, the Internet transport layer is subject to a major change by the introduction of QUIC. Initiated by Google in 2012, QUIC provides a reliable, connection-oriented low-latency and fully encrypted transport. In this paper, we provide the first broad assessment of QUIC usage in the wild. We monitor the entire IPv4 address space since August 2016 and about 46% of the DNS namespace to detected QUIC-capable infrastructures. Our scans show that the number of QUIC-capable IPs has more than tripled since then to over 617.59 K. We find around 161 K domains hosted on QUIC-enabled infrastructure, but only 15 K of them present valid certificates over QUIC. Second, we analyze one year of traffic traces provided by MAWI, one day of a major European tier-1 ISP and from a large IXP to understand the dominance of QUIC in the Internet traffic mix. We find QUIC to account for 2.6% to 9.1% of the current Internet traffic, depending on the vantage point. This share is dominated by Google pushing up to 42.1% of its traffic via QUIC.


  • Entire IPv4 Address Space
  • Internet Transport
  • Traffic Share
  • Akamai
  • Client Hello (CHLO)

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  • DOI: 10.1007/978-3-319-76481-8_19
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This work has been funded by the DFG as part of the CRC 1053 MAKI and SPP 1914 REFLEXES, and by European Union’s Horizon 2020 research and innovation programme under the ENDEAVOUR project (grant agreement 644960). We would like to thank the network operators at RWTH Aachen University, especially Jens Hektor and Bernd Kohler. We further thank our shepherd Tobias Flach and the anonymous reviewers. Furthermore, we would like to thank Konrad Wolsing for maintaining our changes to the quic-go implementation.

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Correspondence to Jan Rüth .

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Rüth, J., Poese, I., Dietzel, C., Hohlfeld, O. (2018). A First Look at QUIC in the Wild. In: Beverly, R., Smaragdakis, G., Feldmann, A. (eds) Passive and Active Measurement. PAM 2018. Lecture Notes in Computer Science(), vol 10771. Springer, Cham.

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