A user reports that they are unable to reach a particular website. The user had no issues reaching the site earlier in the day. Which of the following is the MOST likely cause of the lack of access?

A VLAN misconfiguration would likely cause broader network access issues or persistent problems, not suddenly prevent access to a specific external website that was previously reachable.

An improperly configured NIC would typically cause a complete lack of network access or persistent issues, not an intermittent problem with a single website.

If the DHCP server were down, existing clients would typically retain their IP addresses and connectivity until their lease expired, making it less likely to be the immediate cause of a specific website access issue compared to a DNS outage.

If the DNS server is down, the user's computer cannot translate the website's domain name into an IP address, which is essential for connecting to the web server hosting the site, leading to access failure for that specific website.