https://docs.aws.amazon.com/apigateway/latest/developerguide/dns-failover.html
Configure custom health checks for DNS failover for an API Gateway API - Amazon API Gateway
Learn to configure DNS failover for a multi-Region API Gateway architecture.
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https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/dd197562(v=ws.10)?redirectedfrom=MSDN
Configure Heartbeat and DNS Settings in a Multi-Site Failover Cluster | Microsoft Learn
https://www.prweb.com/releases/dns_made_easy_failover_solutions_saved_over_525_million_of_lost_revenue_q1_2016/prweb13449945.htm
DNS Made Easy Failover Solutions Saved Over $525 Million of Lost Revenue Q1 2016
Reston, VA (PRWEB) June 08, 2016 -- In a survey of DNS Made Easy clients, it was found that DNS Failover and system monitoring has saved clients over half a...
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https://dnsexit.com/
DNSExit | Dynamic DNS, SMTP Relay, DNS Failover, Email Hosting and Web Hosting
DNSExit provides Dynamic DNS, SMTP relay, DNS failover, business email hosting, backup MX, SSL, domains, and web hosting for businesses, IT teams, and...
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