Which of the following commands can be used to resolve a DNS name to an IP address?

The command that is used to resolve a DNS name to an IP address is "host." This tool is designed to perform DNS lookups and can provide information about a hostname, its corresponding IP address, and other relevant DNS records. The "host" command is straightforward to use and provides a simple output to confirm the resolution of a DNS name to its associated IP address.

In DNS operations, this task is essential, as it is often necessary to convert human-readable domain names into machine-readable IP addresses in order to access services on the Internet. The direct nature of the "host" command makes it a preferred choice for users seeking quick DNS inquiries.

Other commands listed do not serve the specific purpose of resolving DNS names. For instance, "dns" is not a standard command in Unix/Linux systems; it may refer to a general concept or tool depending on the context but not for DNS lookups directly. Similarly, "query" is not specifically recognized as a standalone command for DNS resolutions in standard Linux utilities, and "iplookup" does not exist as a common utility for resolving DNS names. Overall, "host" stands out as the effective and correct command for this specific task.