From the course: Troubleshooting VOIP: Identify and Resolve Common VOIP Issues

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Optimizing DNS services

Optimizing DNS services

From the course: Troubleshooting VOIP: Identify and Resolve Common VOIP Issues

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Optimizing DNS services

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- [Instructor] The speed and reliability of DNS services directly impact VoIP connectivity and call quality. In this segment, we'll explore ways to optimize DNS to improve VoIP performance. First, let's review the purpose of domain name system and why it's a critical component of any network. DNS resolves domain names into IP addresses. When DNS issues arise, they can severely disrupt VoIP operations, leading to call failures, poor quality, or dropped connections. As a result, optimizing DNS will help ensure reliable call setup, high call quality, and minimal downtime. So let's discuss some ways we can achieve this. One way is to deploy local DNS servers, which can reduce query latency by handling the resolution in a timely manner. In addition, local DNS servers provide a backup option in case external DNS servers are unreachable. Now, you'll want to make sure that the local servers forward unresolved queries to reliable upstream DNS providers, which can also be a trusted public DNS…

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