Application Request Routing

Amazon Elastic Load Balancing (ELB) is a comprehensive load balancing service provided by AWS that automatically distributes incoming application traffic across multiple targets. ELB offers three types of load balancers: Application Load Balancer (ALB) for HTTP/HTTPS traffic, Network Load Balancer (NLB) for TCP/UDP traffic, and Classic Load Balancer for basic load balancing. ELB can distribute traffic to various AWS resources including EC2 instances, containers, and Lambda functions. It provides features like health checks, SSL/TLS termination, and integration with other AWS services. ELB's ability to automatically scale and its high availability design make it a crucial component for building fault-tolerant and scalable applications in the AWS cloud.

Azure Front Door is Microsoft's global, scalable entry-point service that enhances the performance, reliability, and security of web applications. It combines global load balancing, multi-region failover, caching, and web application firewall (WAF) capabilities into a single network-as-a-service solution. Front Door uses Microsoft's global edge network to route traffic to the fastest and most available application backend. It offers features like SSL offloading, session affinity, and URL-based routing, making it suitable for both static and dynamic content. Front Door's integration with Azure services and its ability to accelerate and protect applications make it a powerful tool for businesses operating at a global scale.

Amazon Application Load Balancer (ALB) is a feature-rich load balancing service that operates at the application layer (Layer 7) of the OSI model. It goes beyond simple traffic distribution by offering content-based routing, which allows routing requests to different target groups based on the content of the request. ALB supports advanced features like host-based and path-based routing, HTTP/2 and WebSocket protocols, and integration with other AWS services like AWS WAF and AWS Certificate Manager. It provides health checks, automatic scaling, and detailed access logs, making it an ideal choice for modern, microservices-based applications deployed in the AWS cloud.