Which of the following commands is utilized for DNS lookups?

The command used for DNS lookups is "nslookup." This utility is specifically designed to query Domain Name System (DNS) records, helping users to find the IP address associated with a domain name or vice versa. When you run nslookup, you can also obtain information about the DNS server being used and query different types of DNS records, such as A, MX, or CNAME records, depending on what information is needed.

In contrast, the other commands serve different purposes. "Ipconfig" is primarily used to display network configuration details for the device, such as IP address, subnet mask, and default gateway, but it does not perform DNS lookups. "Ping" is a command used to test the reachability of a host on a network by sending Internet Control Message Protocol (ICMP) Echo Request messages, which can return an IP address but does not resolve domain names explicitly. Similarly, "tracert" (or "traceroute" in Unix/Linux) is utilized to trace the path that packets take from the source to the destination, providing information about the route but not directly facilitating DNS lookups. Thus, for performing DNS-related queries, nslookup is the appropriate command to use.