The ICT team moves a website to a new server and updates its A record. Hours later, some users still reach the old server while others reach the new one. What explains this?
L'équipe TIC déplace un site web vers un nouveau serveur et met à jour son enregistrement A. Des heures plus tard, certains utilisateurs atteignent encore l'ancien serveur, tandis que d'autres atteignent le nouveau. Qu'est-ce qui l'explique ?
Answers
AThe new server is refusing connections from some of the usersLe nouveau serveur refuse les connexions d'une partie des utilisateurs
BDNS changes only take effect after midnight each dayLes modifications DNS ne prennent effet qu'après minuit chaque jour
CSome browsers ignore DNS and remember old addresses foreverCertains navigateurs ignorent le DNS et retiennent les anciennes adresses pour toujours
DCached answers are still valid until the record's TTL runs outLes réponses en cache restent valables jusqu'à l'expiration du TTL de l'enregistrement
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