Your AD DS domain contoso.com contains a member server named server1.contoso.com. You cannot resolve the server's FQDN, although you can successfully ping the server by its IP address and the Windows Defender Firewall is configured correctly. To confirm whether the DNS record for server1.contoso.com exists, which command should you run?

The nslookup command is used to query DNS servers for information about hostnames and IP addresses. In this scenario, you need to verify if a DNS record for server1.contoso.com exists, making nslookup the appropriate tool. You would typically run nslookup server1.contoso.com to see if a record is returned. tracert (traceroute) is used to display the path and measure transit delays of packets across an IP network. It does not query DNS records. ipconfig displays all current TCP/IP network configuration values and refreshes Dynamic Host Configuration Protocol (DHCP) and Domain Name System (DNS) settings. It does not query DNS for specific hostnames. pathping combines features of ping and tracert to provide more detailed information about network latency and packet loss. It is not used for direct DNS record lookups.