A company wants to deploy, scale, and manage third-party virtual appliances in a cluster in the AWS Cloud. These applications include firewalls, intrusion detection and prevention systems, and deep packet inspection systems. Which AWS service or resource will meet these requirements?

AWS Gateway Load Balancer is a purpose-built service that makes it easy to deploy, scale, and manage third-party virtual appliances such as firewalls, intrusion detection and prevention systems (IDS/IPS), and deep packet inspection systems. It operates at the network layer (Layer 3) and transparently inserts these appliances into the network path without requiring the source to change its destination. This allows traffic to be inspected and secured by the virtual appliance fleet before being routed to the application servers.

A. Application Load Balancer operates at the application layer (Layer 7) and is designed for routing HTTP/HTTPS traffic, not for integrating network-level virtual appliances.
C. Network Load Balancer operates at the transport layer (Layer 4) for high-performance TCP/UDP load balancing but lacks the specific features for managing virtual appliance fleets.
D. AWS Global Accelerator is a networking service that improves application availability and performance for global users by directing traffic over the AWS global network, not for deploying appliances.

1. AWS Documentation. (2023). What is a Gateway Load Balancer? Elastic Load Balancing User Guide. Retrieved from https://docs.aws.amazon.com/elasticloadbalancing/latest/gateway/introduction.html (Specifically, the "Introduction" section states its purpose for deploying and managing virtual appliances).

2. AWS Documentation. (2023). Gateway Load Balancer. Retrieved from https://aws.amazon.com/elasticloadbalancing/gateway-load-balancer/ (The product page states, "Gateway Load Balancer makes it easy to deploy, scale, and manage your third-party virtual appliances").