A cloud administrator is configuring a load balancing solution to route traffic to different backend pools based on the URL path of incoming requests. Which of the following does an application gateway primarily use to make these routing decisions?
Transport layer data, such as source and destination ports
Application layer data, such as URL paths and host headers
Data link layer data, such as source and destination MAC addresses
Network layer data, such as source and destination IP addresses
Application gateways operate at the application layer (Layer 7 of the OSI model) and can inspect the content of HTTP requests. This allows them to make advanced routing decisions based on attributes like the URL path, host headers, or cookies, not just the source/destination IP address and port which is typical of Layer 4 load balancers.
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