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Difficulty: MediumIP Addressing and Network Configuration

A field technician is troubleshooting a network issue where users on a local subnet can access an internal portal using its direct IP address 192.168.50.25192.168.50.25, but receive a web browser error when attempting to navigate to intranet.localintranet.local. The technician confirms that the workstation's IP address, subnet mask, and default gateway are correctly assigned. Which of the following actions should the technician take to resolve the issue?

  1. Reconfigure the DNS server IP address on the workstation to point to a valid host resolution server.Answer
  2. B
    Reconfigure the DHCP server scope to map the domain name intranet.localintranet.local to 192.168.50.25192.168.50.25.
  3. C
    Replace the unmanaged switch with a router to forward hostname broadcast requests across the local subnet.
  4. D
    Change the internal web server HTTP service port binding from port 80 to port 53.

Answer

Reconfigure the DNS server IP address on the workstation to point to a valid host resolution server.
Successful connectivity via raw IP address (192.168.50.25192.168.50.25) combined with failure via domain name (intranet.localintranet.local) demonstrates that basic IP configuration and physical routing are working, but domain name resolution is failing. Correcting the DNS server IP address allows the client to successfully query for and resolve the domain name.

Step-by-Step Solution

1
Analyze host connectivity diagnostic results
Successful IP connection confirms physical Layer 1-3 connectivity and correct local IP/gateway setup.
Direct IP communication proves the network interface, subnet mask, and default gateway are functioning.
2
Identify the failing protocol tier
Failure when accessing by domain name (intranet.localintranet.local) indicates an issue with Name Resolution (DNS).
Domain Name System (DNS) translates human-readable hostnames into numeric IP addresses.
3
Determine corrective action
Configure the workstation with the correct DNS server address.
Assigning a valid DNS server enables the host to query and obtain the correct IP address for intranet.localintranet.local.

Key Concept

DNS vs. DHCP Service Roles and Troubleshooting
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Topics

IP Addressing and Network Configuration

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