HTTP/2 configuration in Nginx - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

Check if HTTP/2 is enabled on Nginx

You run the command curl -I --http2 https://example.com on a server with Nginx configured. What output line confirms HTTP/2 is enabled?

A HTTP/2 200

B HTTP/1.1 200 OK

C HTTP/3 200

D HTTP/1.0 200 OK

💡 Hint

Look for the HTTP version in the response headers.

The response line starting with 'HTTP/2' confirms the server responded using HTTP/2 protocol.

❓ Configuration

intermediate

Enable HTTP/2 in Nginx server block

Which Nginx server block directive correctly enables HTTP/2 for HTTPS?

A listen 443 ssl http2;

B listen 443 ssl;

C listen 443 http2;

D listen 80 http2;

💡 Hint

HTTP/2 requires SSL and the correct listen directive.

The directive 'listen 443 ssl http2;' enables SSL and HTTP/2 on port 443.

❓ Troubleshoot

advanced

Why is HTTP/2 not working despite configuration?

You configured Nginx with listen 443 ssl http2; but HTTP/2 is not working. Which is the most likely cause?

A Not setting server_name directive

B Using port 80 instead of 443

C Not enabling gzip compression

D Missing valid SSL certificate and key files

💡 Hint

HTTP/2 requires a secure connection.

HTTP/2 over Nginx requires SSL with valid certificates; missing them disables HTTP/2.

✅ Best Practice

advanced

Recommended TLS versions for HTTP/2 in Nginx

Which TLS versions should you enable in Nginx to support HTTP/2 securely?

A TLSv1.0, TLSv1.1, TLSv1.2

B TLSv1.0 and TLSv1.1 only

C TLSv1.2 and TLSv1.3 only

D SSLv3 and TLSv1.2

💡 Hint

Older TLS versions are insecure and not recommended.

TLSv1.2 and TLSv1.3 are secure and recommended for HTTP/2 support.

🔀 Workflow

expert

Order steps to enable HTTP/2 on Nginx with SSL

Put these steps in the correct order to enable HTTP/2 on an Nginx server with SSL:

A 2,1,4,3

B 1,4,2,3

C 1,2,4,3

D 4,1,2,3

💡 Hint

Think about getting certificates before configuring paths.

First get certificates, then configure paths, enable HTTP/2 in listen, then reload Nginx.