What is the role of a Layer 7 load balancer in network infrastructure?

Level 7 load balancer (application layer) works with data at the HTTP/HTTPS level and above. Its role is to distribute incoming requests among application servers by analyzing the content of requests (e.g., URL, headers, cookies). This allows for more intelligent load distribution, such as:

• Routing requests to different services based on URL paths
• Session-aware load balancing (sticky sessions)
• Applying security and filtering rules

Unlike lower-level load balancers (TCP/UDP), level 7 allows decision-making based on request content, which improves the flexibility and efficiency of web infrastructure.