Category Archives: DNS Performance

Proximity, Geographical Location and DNS Lookup Speed

Proximity of the name server to the users location plays a very important role in DNS lookup speed. Proximity reduces the number of hops that take place while the DNS packets are routed. This is the reason why several large … Continue reading

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Recursive DNS Queries may degrade performance

It is a known fact that supporting open DNS recursion on your name servers is not recommended. Recursive queries cause more load on the name server and as I show in this article, it significantly degrades performance. I will quantify … Continue reading

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DNS Speed (Latency) from USA to other countries

A question I got from a user was – what is the average DNS speed from USA to my country?┬áMany times, your name server might not be in the US but in some other distant country and one might wonder … Continue reading

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TTL Values: Statistics and Distribution

Last week I wrote about the statistics on the number of name servers. In this post I am going to have some fun analyzing our data about TTLs and report statistics and the distribution of the TTL (time to live) … Continue reading

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Number of Name Servers – Statistics and Distribution

Authoritative Name Servers are an important part of the domain name system (DNS); they provide the necessary resolution from a user friendly name like google.com to its IP address. Should a name server fail, this resolution cannot happen and visitors … Continue reading

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