Does setting up Cloudflare DNS on my PC affect my internet speed if the service is down?

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Grade: Education Subject: Support
Does setting up Cloudflare DNS on my PC affect my internet speed if the service is down?
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If Cloudflare's DNS service were to experience an outage, and your PC is configured to exclusively use Cloudflare DNS, you might not be able to resolve domain names, effectively losing internet access for browsing. However, Cloudflare has a very high uptime, and having a secondary DNS server entered (e.g., 1.0.0.1 as a backup to 1.1.1.1) can mitigate this risk.