If a technician can ping a web server's IP address but not its URL, which software utility can diagnose the issue?

If a technician can ping a web server's IP address but not its URL, which software utility can diagnose the issue?

• A. ping
• B. tracert
• C. nslookup
• D. netstat

Answer: (C)

When a technician can ping a web server's IP address successfully but cannot reach it using its URL, the underlying issue likely relates to domain name resolution. The utility that can best diagnose this problem is nslookup. nslookup is specifically designed to query the Domain Name System (DNS) to obtain information about domain names, including resolving a domain name into its corresponding IP address. In this scenario, using nslookup to check the DNS records for the web server's URL will help identify if there is a resolution issue, such as an incorrect or missing DNS entry for the URL. By using nslookup, the technician can quickly determine if the URL can be resolved to an IP address or if there’s a DNS misconfiguration that is preventing the URL from being translated into the correct IP. This makes nslookup the most appropriate tool to diagnose the problem at hand. In contrast, ping is useful for checking connectivity to an IP address but does not provide any information about DNS. Tracert helps trace the path packets take to a destination but does not deal with name resolution. Netstat provides information about current network connections and their statuses but does not assist with DNS resolution specifically. Therefore, nslookup is the most relevant utility in this situation.

When a technician can ping a web server's IP address successfully but cannot reach it using its URL, the underlying issue likely relates to domain name resolution. The utility that can best diagnose this problem is nslookup.

nslookup is specifically designed to query the Domain Name System (DNS) to obtain information about domain names, including resolving a domain name into its corresponding IP address. In this scenario, using nslookup to check the DNS records for the web server's URL will help identify if there is a resolution issue, such as an incorrect or missing DNS entry for the URL.

By using nslookup, the technician can quickly determine if the URL can be resolved to an IP address or if there’s a DNS misconfiguration that is preventing the URL from being translated into the correct IP. This makes nslookup the most appropriate tool to diagnose the problem at hand.

In contrast, ping is useful for checking connectivity to an IP address but does not provide any information about DNS. Tracert helps trace the path packets take to a destination but does not deal with name resolution. Netstat provides information about current network connections and their statuses but does not assist with DNS resolution specifically. Therefore, nslookup is the most relevant utility in this situation.