A company is using open source NGINX and wants to implement health checks that can detect a backend failure even when there is no user traffic. They are considering upgrading to NGINX Plus. What is the primary benefit of NGINX Plus for this scenario?

NGINX Plus can automatically restart failed backend servers.

NGINX Plus can send periodic synthetic requests to backends, allowing it to detect failures even during idle periods.

NGINX Plus can use passive health checks with a lower max_fails value.

NGINX Plus can monitor backend health using system metrics like CPU and memory.

Which statement accurately describes passive health checks in open source NGINX?

They require the `health_check` directive to be configured in the server block

They send ICMP ping packets to upstream servers to verify availability

They are enabled by default and require no configuration to detect failed servers

They only work when the upstream server returns a 200 status code

After an upstream server has been marked as failed by a passive health check, when does NGINX start sending requests to it again?

When the server sends a TCP RST packet to NGINX

Immediately after the server returns a single successful response

After the `fail_timeout` period has elapsed, NGINX will retry the server with a new request

Only after NGINX is reloaded or restarted

What is the main advantage of active health checks over passive health checks?

They do not require any configuration

They can detect server failures even when there is no client traffic

They use less bandwidth than passive health checks

They are available in all versions of NGINX

An administrator is troubleshooting intermittent 502 errors in an open source NGINX setup. The upstream has two servers, both configured with max_fails=1 and fail_timeout=10s. The administrator notices that when one server has a brief hiccup, all requests fail for a short period. What is the most likely cause?

The proxy_next_upstream directive is set to off, preventing failover to the other server.

The fail_timeout is too short, causing NGINX to retry the failed server too quickly.

max_fails=1 is too aggressive, causing the server to be marked as failed after a single error, and the other server may also be overwhelmed or failing.

NGINX is sending active health checks that are failing, causing both servers to be marked down.

F5 Certified Administrator NGINX - Configuration:Knowledge

Domain 4Objective 8

Describe How Open Source NGINX Handles Health Checks in Different Situations F5N2 Practice Questions (Page 1)

Part of the Configure NGINX as a reverse proxy domain, which makes up ~33% of our current practice bank. F5 does not publish an official question count, but from its 30-minute exam (~10–20 total, ~3–7 in this domain), expect 1–1 from this objective — we provide 15 practice questions to prepare you well beyond it. (estimate)

15questions here

3free pages

5concepts

Questions 1–5

1application · medium
A company is using open source NGINX and wants to implement health checks that can detect a backend failure even when there is no user traffic. They are considering upgrading to NGINX Plus. What is the primary benefit of NGINX Plus for this scenario?
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2foundation · easy
Which statement accurately describes passive health checks in open source NGINX?
Select an answer first
3foundation · easy
After an upstream server has been marked as failed by a passive health check, when does NGINX start sending requests to it again?
Select an answer first
4foundation · easy
What is the main advantage of active health checks over passive health checks?
Select an answer first
5application · medium
An administrator is troubleshooting intermittent 502 errors in an open source NGINX setup. The upstream has two servers, both configured with max_fails=1 and fail_timeout=10s. The administrator notices that when one server has a brief hiccup, all requests fail for a short period. What is the most likely cause?
Select an answer first

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