Which command would you choose to retrieve website headers for diagnosis?

Choosing to use the command that retrieves website headers for diagnosis aligns well with the purpose of examining the HTTP response headers sent by a web server. The curl -I <target IP> command is specifically designed for this task. The -I option instructs curl to send a HEAD request, which only retrieves the headers without downloading the entire body of the response. This is particularly useful for diagnosing web server configurations, verifying that the server is responding correctly, and checking for specific header values such as security settings or caching information.

In contrast, the other options serve different purposes. The wget -S <target IP> command is focused on retrieving files from web servers and can also display headers, but it is primarily used for downloading content rather than purely for diagnosis. The nmap -Pn <target IP> command is a network scanning tool used to discover hosts and services on a network, and while it can provide some service information, it's not specifically tailored for HTTP headers. Lastly, the dig <target IP> command is a DNS lookup utility mainly used for querying DNS records, which does not pertain to retrieving HTTP headers.

Thus, using curl with the -I option is the most effective and straightforward method to retrieve and diagnose