Explain What Is Unique to NGINX as a Reverse Proxy F5N2 Practice Questions (Page 5)

Questions 21–25

1. 21application · medium

   An e-commerce company runs a web application on three backend servers. They want to use NGINX as a reverse proxy to distribute traffic evenly and automatically stop sending requests to a backend that fails. Which configuration approach should they use?

   • ADefine an upstream block with the three servers and use the default round-robin load balancing method.
   • BConfigure a separate server block for each backend and use the 'weight' parameter to balance traffic.
   • CSet up a TCP proxy with the 'listen' directive on port 80 and use the 'proxy_bind' directive to select backends.
   • DUse a single server block with proxy_pass to one backend and rely on DNS to distribute traffic.
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2. 22foundation · easy

   What is the primary benefit of NGINX's event-driven architecture over a traditional process-per-connection web server?

   • AIt enables higher concurrency with lower memory and CPU overhead.
   • BIt guarantees that each request is processed in a separate isolated environment.
   • CIt simplifies the configuration of virtual hosts and server blocks.
   • DIt allows the server to run on hardware with a single CPU core.
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4. 23foundation · easy

   When NGINX is configured as a software load balancer, what happens if one of the backend servers in the `upstream` group becomes unavailable?

   • ANGINX returns a 502 Bad Gateway error for all requests.
   • BNGINX automatically redirects requests to the remaining available backend servers.
   • CNGINX restarts the failed backend server automatically.
   • DNGINX stops serving requests until the server comes back online.
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5. 24application · medium

   A media company serves a large number of static images and videos from backend servers. The backend infrastructure is struggling with the load, and response times are increasing. They want to reduce the load on the backends and improve response times for users. What should they configure on their NGINX reverse proxy?

   • AIncrease the number of worker processes to handle more concurrent connections.
   • BEnable gzip compression for all responses to reduce the amount of data transferred.
   • CSet up caching of backend responses using proxy_cache_path and proxy_cache directives.
   • DUse the 'proxy_buffering off' directive to stream responses directly from the backend.
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6. 25expert · medium

   A company runs a multi-tenant SaaS platform. They use NGINX as a reverse proxy to route requests to different backend services based on the URL path. They also need to add custom headers to requests for authentication purposes. They want to ensure that the configuration is maintainable and scalable as they add more tenants. What is the best approach?

   • ACreate a separate 'server' block for each tenant and use 'location' blocks to route to the appropriate backend.
   • BUse a single 'location' block with a regular expression to capture the tenant and use 'proxy_pass' with a variable.
   • CUse a 'map' directive to define backend addresses based on the URL path, and use 'proxy_set_header' to add custom headers.
   • DUse 'if' directives to check the URL and set variables for the backend address.
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