A technician is unable to reach a server by its name but can access it via IP address. What is the most likely cause of this issue?

A technician is unable to reach a server by its name but can access it via IP address. What is the most likely cause of this issue?

• A. Firewall configuration
• B. DNS misconfiguration
• C. IP address conflict
• D. Network cable issue

Answer: (B)

The scenario describes a situation where a technician can access a server using its IP address but not by its hostname. This points strongly to a Domain Name System (DNS) misconfiguration. When a hostname is requested, the system relies on DNS to resolve that hostname into its corresponding IP address. If DNS is misconfigured, it may lead to an inability to resolve the server name to the correct IP address, resulting in the technician being unable to connect using the name while still having access directly via the IP address. Common DNS issues may include configuration errors on the DNS server itself, stale DNS records, or issues with the DNS client configuration on the technician's machine. In contrast, other options do not directly address the issue of hostname resolution. A firewall configuration could prevent access entirely but wouldn't account for the ability to reach the server via IP. An IP address conflict would typically result in intermittent connectivity issues and would likely affect both hostname and IP access. A network cable issue could impede connection to the server altogether, again leaving IP access intact if the issue does not affect the path to the server. Thus, the misconfiguration of DNS serves as the most likely explanation for the technician's specific problem of accessing the server by IP address but not by name.

The scenario describes a situation where a technician can access a server using its IP address but not by its hostname. This points strongly to a Domain Name System (DNS) misconfiguration.

When a hostname is requested, the system relies on DNS to resolve that hostname into its corresponding IP address. If DNS is misconfigured, it may lead to an inability to resolve the server name to the correct IP address, resulting in the technician being unable to connect using the name while still having access directly via the IP address. Common DNS issues may include configuration errors on the DNS server itself, stale DNS records, or issues with the DNS client configuration on the technician's machine.

In contrast, other options do not directly address the issue of hostname resolution. A firewall configuration could prevent access entirely but wouldn't account for the ability to reach the server via IP. An IP address conflict would typically result in intermittent connectivity issues and would likely affect both hostname and IP access. A network cable issue could impede connection to the server altogether, again leaving IP access intact if the issue does not affect the path to the server. Thus, the misconfiguration of DNS serves as the most likely explanation for the technician's specific problem of accessing the server by IP address but not by name.