Layer 7 load balancers operate on the application layer.
A layer 7 load balancer stops the network traffic and reads the message to make a distribution decision based on the content of the message.
If you use a layer 7 load balancer, the solution requires application rules, which terminates the SSL connections, inspects the Uniform Resource Identifier (URI), and redirects the connection to the correct Cloud Proxy instance .
Layer 7 load balancing advantages
You need one public Virtual IP address endpoint.
You need one IP address.
You need one certificate.
You need one IP pool.
Layer 7 load balancing disadvantages
Layer 7 load balancers read each message to determine the destination, which affects the performance compared to the Layer 4 load balancing model .
Lower throughput compared to Layer 4 load balancers .