AWS re:Invent 2017: Elastic Load Balancing Deep Dive and Best Practices (NET402)

Elastic Load Balancing automatically distributes incoming application traffic across multiple Amazon EC2 instances for fault tolerance and load distribution. In this session, we go into detail about Elastic Load Balancing configuration and day-to-day management, and also its use with Auto Scaling. We explain how to make decisions about the service and share best practices and useful tips for success.

[majorbadidea]

I really am not a network professional, but isn't the 4th layer transport and 3rd layer network? Slide at: 1:38
Thanks for explanation