What is the difference between the conventional and quick methods for generating SSL certificates with OpenSSL?

The conventional method involves three separate commands: generating a private key, creating a certificate signing request (CSR), and self-signing it. The quick method uses a single command with a `-subj` parameter to automate CSR generation, then self-signs. Both methods initially lack SAN, leading to browser warnings. To fix, both require a configuration file with `subjectAltName` as described in the article.