What is elb and alb in aws?
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Answer # 1 #
ELB works at both layer 4 (TCP) and 7 (HTTP) and is the only load balancer that works in EC2-Classic, in case you have a very old AWS account. Also, it's the only load balancer that supports application-defined sticky session cookies; in contrast, ALB uses its own cookies, and you have no control over that.
