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Hi Luke,
Thank you for the feedback.
I would generally choose an Application Load Balancer (ALB) for general load balancing questions. I would only choose a Network Load Balancer for specific scenarios that have specific requirements such as:
– need to be able to handle millions of requests per second, with very minimal latency
– Application requires TCP/UDP connections (ALB is limited to only HTTP/HTTPS connections)
– Requires ultra low latency connections.
– preserves the client-side source IP allowing the back-end to see the IP address of the client
– Load Balancer requires a static or elastic IP.
As for the pricing for ALB vs. NLB, AWS pricing changes may have lowered the pricing for using an NLB. AWS usually changes the prices popular services, depending on region, without any further notice. Our team will review the explanation and will update it accordingly.
Thank you.
Let us know if you need further assistance. The Tutorials Dojo team is dedicated to helping you pass your AWS exam!
Regards,
Kenneth Samonte @ Tutorials Dojo
