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A network administrator changed an external DNS to point customers to a new server. Which of the following tools should the administrator use to test the new server's configuration?
Correct Answer: D
*nslookup allows querying DNS records to verify if the new server is correctly resolving domain names. *ping (A) tests basic connectivity, not DNS configuration. *tracert (B) shows network path latency but doesn't test DNS. *tcpdump (C) captures packets but isn't ideal for DNS verification. #Reference: CompTIA Network+ N10-009 Official Documentation - DNS Testing Tools.