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Frontend Performance Quiz Practice
Active Recall Drill Session
← Exit Session
Question 1 of 1
medium
Frontend Performance
What does preconnect actually do, mechanically?
A
It downloads the full resource in advance
B
It performs DNS lookup + TCP handshake + TLS negotiation early, so the ACTUAL request, when it happens, skips that setup latency entirely
C
It caches the resource permanently in the browser
D
It has an identical effect to preload
Check Answer