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DNS Load Balancing and High Availability

A video site has servers in Europe, North America, and Asia. A user in Tokyo types the site's name. A user in Madrid types the same name at the same moment.

Both users should reach a server near them. And if the servers in Asia fail, the user in Tokyo should still reach the site.

The first decision happens before any request reaches a server. It happens when DNS chooses which IP address to return. This lesson explains how DNS uses that choice to spread load and to keep a service available.

Why DNS Can Balance Load

A DNS server does not have to give every user the same answer

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tw none

tw none

· 7 months ago

Some of these passages are just fluff with vague points or without detail at all. "Content Delivery Networks (CDNs) and their relation to DNS" doesn't really highlight the importance of DNS in relation to CDNs specifically. It's just describing what the DNS already does. "Geographically distributed DNS servers" is another section that just vaguely touches on key benefits.

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Abdullah

Abdullah

· 2 years ago

title

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The lone Ranger

The lone Ranger

· 3 years ago

Adding highlighter like educative will help alot in highlighting important points.

Thanks

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Ricardo Franco

Ricardo Franco

· 3 years ago

CDNs help improve the performance, reliability, and security of websites and web services by distributing the load among multiple servers and serving content from the server closest to the user.

How distributing the load among multiple servers can improve the security of websites?

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