A technician is setting up a public-facing web server and needs to ensure traffic is secure. Which of the following steps should the technician take to begin this process?

Domain validation is a process that verifies ownership of a domain before an SSL certificate is issued. While important for ensuring the legitimacy of the certificate request, it is a step that occurs after the CSR has been generated. Therefore, domain validation cannot be the first action taken in securing the web server.

DNS filtering is a security measure used to block access to malicious websites by filtering DNS requests. Although valuable for enhancing overall network security, it does not directly contribute to the process of securing traffic to a web server and is not a necessary step in the initial setup of SSL certificates.

Wildcard creation refers to generating a wildcard SSL certificate that can secure multiple subdomains under a single domain. While this can be useful for managing multiple subdomains, it requires a CSR to be generated first. Thus, wildcard creation cannot be the first step in establishing secure traffic for the web server.