By spreading arriving traffic across several EC2 instances, AWS Load Balancing enhances fault tolerance and guarantees best resource use, hence complementing Auto Scaling.

AWS Gateway Load Balancer is a new fully-managed network gateway and load balancer. The service is tailored to deploy, scale and manage third-party virtual appliances such as firewalls, intrusion ...

AWS Gateway Load Balancer makes it simple and cost-effective to deploy, scale and manage virtual appliances such as firewalls or network monitoring systems in the cloud, the company said.

AWS Gateway Load Balancer aims to 'make it easy and cost-effective to deploy, scale and manage the availability of third-party virtual appliances'.

For example, a medium-size website running on 10 Amazon EC2 instances in Northern Virginia could use one Elastic Load Balancer to balance incoming traffic.