A user is unable to navigate to a website because the provided URL is not resolving to the correct IP address. Other users are able to navigate to the intended website without issue. Which of the following is most likely causing this issue?

A self-signed certificate pertains to SSL/TLS encryption and is unrelated to URL resolution issues. While it can cause warnings in browsers when accessing secure sites, it does not affect the ability to resolve a URL to its corresponding IP address. Therefore, this option does not explain why the user cannot navigate to the website.

Name server records dictate how domain names resolve to IP addresses in DNS. If other users can access the site, then the DNS records are likely configured correctly. This choice would only be relevant if multiple users were experiencing issues, making it an unlikely cause in this scenario.

An IP helper is typically used in network configurations to facilitate communication between different subnets and does not directly relate to URL resolution. This option would not impact a single user's ability to access a website while allowing others to do so, making it an incorrect choice.