A server that manages a database mapping domain names to IP addresses and provides name resolution services. When a user enters a URL in a browser, the DNS server translates the domain name into the IP address needed for communication. If the DNS server fails, direct IP-address connections still work, but domain-name access does not.

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• 2017h29h #66情報処理技術者試験の日程を確認するために，Web ブラウザのアドレスバーに情報処理技術者試験センターの URL “https://www.jitec.ipa.g…