You're browsing the Web and encounter an error when entering a domain name. What’s the most likely cause?

The most likely cause of encountering an error when entering a domain name while browsing the Web is related to a problem in your network's DNS configuration. DNS, or Domain Name System, is responsible for translating domain names (like www.example.com) into IP addresses that computers use to identify each other on the network. If there is an issue with the DNS configuration, such as incorrect settings or the DNS server being unreachable, your browser will not be able to resolve the domain name to its corresponding IP address, leading to an error.

The other options do not accurately reflect the underlying issue that would cause a failure in domain name resolution. For example, while there might be situations where the Internet connection itself is not functioning, it is more specific to DNS problems when an error occurs solely from entering a domain name. Additionally, domain names can contain both uppercase and lowercase letters, and thus the requirement for web addresses to be in lowercase is inaccurate and irrelevant to the error in this case. The address line is designed to accept domain names and IP addresses interchangeably, making that option less likely to be the cause of the error.