Guide to Understanding Types of Elastic Load Balancers

Elastic Load Balancing (ELB) is one of the important concepts in AWS solutions architect. It supports the distribution of workloads and traffic across multiple servers, thus enhancing the overall performance of applications running on AWS.
There are three main types of ELBs in AWS:
1. Classic Load Balancer (CLB): This is the oldest type and offers basic load balancing across multiple EC2 instances.
2. Network Load Balancer (NLB): This ELB makes routing decisions at the transport layer (TCP, TLS) and can handle millions of requests per second.
3. Application Load Balancer (ALB): This ELB makes routing decisions at the application layer (HTTP/HTTPS) and supports path-based routing.

When studying for an exam on AWS Solution Architect-Elastic Load Balancing, it's crucial to understand the differences between these ELB types and when to use each one.

Exam Tips: Answering Questions on Elastic Load Balancer Types
1. Understand that each type of ELB has its use case. For example, if you need flexible application management and the ability to route traffic to multiple services, an ALB would be appropriate.
2. When choosing between NLB and ALB, remember that NLB operates at the Transport Layer (layer 4 of the OSI model), whereas ALB operates at the Application Layer (layer 7 of the OSI model).
3. Realize that the choice of a load balancer fundamentally depends on the specific requirements of your application.
4. Always read the question carefully to identify keywords which will help you determine the correct type of ELB to use.