Specialized Configurations F5N2 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   An online gaming company uses NGINX as a layer 4 load balancer for its WebSocket server fleet. The backend servers have varying processing capabilities, and the administrator wants to ensure that connections are distributed based on the current number of active connections on each server. Which load balancing method should be configured in the stream upstream block?

   • Aleast_conn
   • Bround_robin
   • Cip_hash
   • Dhash $remote_addr consistent
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   Which statement correctly describes the role of NGINX as a layer 4 load balancer?

   • AIt inspects HTTP headers and routes traffic based on URI paths.
   • BIt forwards TCP and UDP traffic based on IP address and port information.
   • CIt decrypts TLS traffic before forwarding it to backend servers.
   • DIt caches HTTP responses to reduce backend load.
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   Which directive in the stream upstream block controls how many failed connection attempts are needed before a server is considered unhealthy?

   • Ahealth_check
   • Bproxy_timeout
   • Cmax_fails
   • Dfail_timeout
   Reveal Solution Discussion Select an answer first
5. 4application · medium

   A logistics company needs to load balance DNS queries to a fleet of DNS servers. The DNS protocol uses UDP for most queries and TCP for zone transfers. The administrator wants to use NGINX as a layer 4 load balancer for both protocols. Which configuration approach should be used?

   • AConfigure two separate server blocks in the stream context: one listening on UDP port 53 and another listening on TCP port 53, both proxying to the same upstream group
   • BConfigure a single server block in the stream context listening on port 53 that handles both TCP and UDP traffic
   • CConfigure a stream block with a single upstream that uses the udp parameter to handle both protocols
   • DConfigure the load balancing in the http context with a server block listening on port 53
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   A telecommunications provider uses NGINX as a layer 4 load balancer for its SIP (Session Initiation Protocol) servers over UDP. The operations team needs to ensure that traffic is only sent to SIP servers that are responding to OPTIONS requests. The administrator wants to configure health checks that actively probe the backend servers. Which configuration approach should be used in the stream context?

   • AConfigure an active health check using the health_check directive with a custom UDP probe that sends an OPTIONS request and expects a valid response
   • BConfigure the zone directive in the stream server block and rely on the default passive health checks
   • CConfigure passive health checks using the max_fails and fail_timeout parameters on the upstream server definitions
   • DUse the http context health_check directive with a TCP probe to the SIP servers
   Reveal Solution Discussion Select an answer first