Networking·Advanced·Conceptual·1 min read

What does QUIC bring beyond fixing TCP head-of-line blocking?

Short interview answer

Faster connection establishment by combining transport and cryptographic handshakes (often 1-RTT, or 0-RTT on resumption), and connection migration, so a connection survives a network change like Wi-Fi to cellular without a full re-handshake. Both especially help mobile.

Key takeaway

Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.

← Back to HTTP/2, HTTP/3, and connection performance

What does QUIC bring beyond fixing TCP head-of-line blocking?

Key takeaway

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