Skip to content

SubjectsEvery topic, in course order
Forge 100The 900-day challenge

Problems1,948 graded problems
ContestsTimed rounds
PlaygroundAsk a model why

Placement prepAptitude and rounds
Interview experiencesWhat was actually asked
Build a résuméFree, on this site

HackathonsWhat is on, and when
OpportunitiesInternships and roles
CampusWhat is happening near you

DiscussAsk and answer
LeaderboardWhere you sit

/

Sign in Get Started

Computer Networks·IPv6 & Modern Addressing·Core

Racing the two protocols

Happy Eyeballs starts an IPv6 connection, waits a short interval, then starts an IPv4 connection in parallel and uses whichever succeeds first.

What failure does this address?