Explain What Is Unique to NGINX as a Reverse Proxy F5N2 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A company wants to secure traffic between clients and their web application. The backend servers are running plain HTTP and the team wants to minimize the performance impact on the backends. They plan to use NGINX as a reverse proxy. What should they configure on NGINX to achieve this?

   • AEnable SSL/TLS termination on NGINX and forward requests to the backends over HTTP.
   • BUse the 'ssl_certificate' directive on the backend servers and have NGINX act as a TCP proxy.
   • CConfigure SSL/TLS on each backend server and have NGINX pass through the encrypted traffic.
   • DSet up a VPN between NGINX and the backends to encrypt traffic without using SSL/TLS.
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2. 2application · medium

   A startup runs a high-traffic API on a single NGINX instance acting as a reverse proxy for 50 backend servers. The team is evaluating whether to switch to a traditional Apache server with a worker-thread model. The API experiences thousands of concurrent connections, many of which are slow clients. Which characteristic of NGINX makes it the better choice for this workload?

   • ANGINX uses an event-driven, asynchronous architecture that handles many connections with a small number of worker processes.
   • BNGINX caches upstream responses in memory by default, reducing the need for backend connections.
   • CNGINX automatically compresses all responses to reduce bandwidth usage for slow clients.
   • DNGINX uses a single-threaded process that can only handle one connection at a time, but it is faster per request.
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4. 3foundation · easy

   In the context of NGINX as a reverse proxy, what is the primary purpose of the `upstream` block in the configuration?

   • ATo define the list of backend servers that can receive client requests.
   • BTo define the access control rules for the proxy server.
   • CTo set the maximum size of client request bodies.
   • DTo specify the SSL/TLS certificates for the proxy server.
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5. 4expert · medium

   A company runs a high-traffic web application that experiences periodic spikes in traffic. They are using NGINX as a reverse proxy with a traditional process-per-connection model on a single server. They are considering switching to NGINX's event-driven architecture to handle the spikes more efficiently. They have a limited budget and cannot add more servers. What is the primary benefit they will gain from this switch?

   • ANGINX will use significantly less memory and CPU per connection, allowing it to handle more concurrent connections on the same hardware.
   • BNGINX will automatically cache all responses, reducing the load on the backend servers.
   • CNGINX will automatically compress responses, reducing bandwidth usage.
   • DNGINX will automatically distribute traffic across multiple servers, providing load balancing.
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6. 5application · medium

   An online gaming company runs a real-time service on multiple backend servers. They need to ensure that if a backend server becomes unresponsive, NGINX automatically stops sending traffic to it and redirects requests to healthy servers. They also want to periodically verify that a server is healthy by sending a specific request to a health check endpoint. What should they configure on NGINX?

   • AUse passive health checks by setting 'max_fails' and 'fail_timeout' in the upstream block.
   • BUse the 'check' directive in the http block to enable health checks globally.
   • CUse active health checks with the 'health_check' directive in the upstream block.
   • DConfigure a 'server' block with 'proxy_next_upstream' to retry requests on another server.
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