DNS Latency, Not Slow Internet, Often Behind Sluggish Web Browsing

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What many users perceive as slow internet is frequently caused by DNS resolution delays, where lookups via overloaded or distant ISP servers can add over 100 milliseconds to every web request. A simple diagnostic is to access a site directly by IP address — if that loads instantly while a domain name hangs on 'Resolving host', DNS is likely the culprit. Many consumer routers intercept DNS traffic on port 53, forcing devices to use the ISP's default resolvers rather than faster alternatives. Switching to public resolvers such as Cloudflare's 1.1.1.1 or Quad9's 9.9.9.9 via DHCP configuration can significantly reduce lookup times. Users can verify which DNS server is handling their queries by running the nslookup command and checking whether responses are being proxied through the local router gateway.

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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