which availability zone elastic load balancer

Description

https://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-subnets.html

Availability Zones for your Application Load Balancer …
https://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-subnets.html
After you disable an Availability Zone, the targets in that Availability Zone remain registered with the load balancer, but the load balancer will not route requests to them. To update Availability Zones using the console

https://docs.aws.amazon.com/elasticloadbalancing/latest/classic/enable-disable-az.html

Add or remove Availability Zones for your load balancer in …
https://docs.aws.amazon.com/elasticloadbalancing/latest/classic/enable-disable-az.html
When you add an Availability Zone to your load balancer, Elastic Load Balancing creates a load balancer node in the Availability Zone. Load balancer nodes accept traffic from clients and forward requests to the healthy registered instances in one or more Availability Zones.

https://aws.amazon.com/elasticloadbalancing/

Elastic Load Balancing – Amazon Web Services
https://aws.amazon.com/elasticloadbalancing/
Elastic Load Balancing is part of the AWS network, with native awareness of failure boundaries like AZs to keep your applications available across a region, without requiring Global Server Load Balancing (GSLB). ELB is also a fully managed service, meaning you can focus on delivering applications and not installing fleets of load balancers.

https://docs.aws.amazon.com/elasticloadbalancing/latest/userguide/how-elastic-load-balancing-works.html

How Elastic Load Balancing works – Elastic Load Balancing
https://docs.aws.amazon.com/elasticloadbalancing/latest/userguide/how-elastic-load-balancing-works.html
Availability Zones and load balancer nodes When you enable an Availability Zone for your load balancer, Elastic Load Balancing creates a load balancer node in the Availability Zone. If you register targets in an Availability Zone but do not enable the Availability Zone, these registered targets do not receive traffic.

https://docs.aws.amazon.com/elasticloadbalancing/latest/network/network-load-balancers.html

Network Load Balancers – Elastic Load Balancing
https://docs.aws.amazon.com/elasticloadbalancing/latest/network/network-load-balancers.html
Elastic Load Balancing creates a load balancer node in the Availability Zone and a network interface for the subnet (the description starts with ELB net and includes the name of the load balancer). Each load balancer node in the Availability Zone uses this network interface to get an IPv4 address.

https://aws.amazon.com/elasticloadbalancing/features/

Elastic Load Balancing features – Amazon Web Services
https://aws.amazon.com/elasticloadbalancing/features/
High availability An Elastic Load Balancer is highly available. You can distribute incoming traffic across your Amazon EC2 instances in a single Availability Zone or multiple Availability Zones. An Elastic Load Balancer automatically scales its request handling capacity in response to incoming application traffic.

https://docs.aws.amazon.com/elasticloadbalancing/latest/classic/enable-disable-crosszone-lb.html

Configure cross-zone load balancing for your Classic Load …
https://docs.aws.amazon.com/elasticloadbalancing/latest/classic/enable-disable-crosszone-lb.html
With cross-zone load balancing, each load balancer node for your Classic Load Balancer distributes requests evenly across the registered instances in all enabled Availability Zones. If cross-zone load balancing is disabled, each load balancer node distributes requests evenly across the registered instances in its Availability Zone only.

https://stackoverflow.com/questions/11424481/aws-elastic-load-balancer-and-multiple-availability-zones

AWS Elastic Load Balancer and multiple availability zones
https://stackoverflow.com/questions/11424481/aws-elastic-load-balancer-and-multiple-availability-zones
Incoming traffic is load balanced equally across all Availability Zones enabled for your load balancer, so it is important to have approximately equivalent numbers of instances in each zone.

https://docs.microsoft.com/en-us/azure/load-balancer/load-balancer-standard-availability-zones

Azure Load Balancer and Availability Zones – Azure Load …
https://docs.microsoft.com/en-us/azure/load-balancer/load-balancer-standard-availability-zones
Azure Load Balancer supports availability zones scenarios. You can use Standard Load Balancer to increase availability throughout your scenario by aligning resources with, and distribution across zones. Review this document to understand these concepts and fundamental scenario design guidance

https://aws.amazon.com/premiumsupport/knowledge-center/elb-attach-elastic-ip-to-public-nlb/

Attach an Elastic IP address to an internet-facing Network …
https://aws.amazon.com/premiumsupport/knowledge-center/elb-attach-elastic-ip-to-public-nlb/
Elastic IP addresses can be set for new Availability Zones when you edit the settings. Open the Amazon EC2 console. Choose the Region in which your Network Load Balancer is located. Under Load Balancing, choose Load Balancers.