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NS1 Academy

We proudly offer NS1.Academy, the industry's only free, vendor-neutral DNS certification

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Understanding TTL Values In DNS Records

Time To Live, or TTL for short, is the sort of expiration date that is put on a DNS record. The TTL serves to tell the recursive server or local resolver how long it should keep said record in its cache.

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The Root Name Servers

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DNS Retransmission

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What's The Difference? Authoritative and Recursive DNS Explained

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NS1 Filter Chain: A Quick Primer

One of the most powerful aspects of the NS1 platform is our unique Filter Chain technology to enable easy configuration of traffic management algorithms for your application and network.

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What is Split Horizon or Multiview DNS?

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Adding Intelligence to Internet Traffic Routing

In this post we'll discuss key challenges affecting application performance and examine the birth of new technologies, multi CDN designs and how they affect DNS.

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Behind the Scenes: How Geographic Routing Works

The basic concept behind geographic routing, also known as geolocation or geo-locational routing, is to return a DNS answer that is physically closest to the requestor.

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DNS Records Explained

DNS (Domain Name System) records are what keeps the internet working the way consumers expect, and new records are being added as our needs grow.

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What Exactly Is Secondary DNS?

A lot of registrars ask you for “primary” and “secondary” nameservers for your domain, but that’s not really what secondary DNS is all about.

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