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Question

Difficulty: MediumWindows Client Networking Configuration

A help desk technician is configuring static IPv4 parameters on a Windows 11 Workstation via Network Connections (ncpa.cpl). The workstation requires an IP address of 10.0.4.150 and a subnet mask of 255.255.255.0. When entering 10.0.5.1 as the Default Gateway, Windows displays a warning message stating that the default gateway is not on the same network segment defined by the IP address and subnet mask. Which of the following configuration changes will resolve the warning and allow proper local subnet communication and default routing?

  1. Change the Default Gateway address to a valid host IP address on the 10.0.4.0/24 subnet, such as 10.0.4.1.Answer
  2. B
    Set the Default Gateway address to 127.0.0.1 to route non-local traffic through the loopback interface.
  3. C
    Run the command ipconfig /renew from an elevated Command Prompt to force the local router to dynamically accept the gateway override.
  4. D
    Open Credential Manager in Control Panel to update the stored gateway administrator credentials for the remote subnet.

Answer

Change the Default Gateway address to a valid host IP address on the 10.0.4.0/24 subnet, such as 10.0.4.1.
For a host to communicate with destination networks outside its local broadcast domain, the assigned default gateway IP address must reside on the exact same network segment defined by the host IP address and subnet mask. With an IP of 10.0.4.150 and a subnet mask of 255.255.255.0 (/24), valid gateway addresses must fall between 10.0.4.1 and 10.0.4.254. Changing the gateway to 10.0.4.1 satisfies TCP/IP routing rules and eliminates the configuration error.

Step-by-Step Solution

1
Analyze the IP address and subnet mask configuration.
The host IP address 10.0.4.150 with a subnet mask of 255.255.255.0 (/24) defines a local network segment spanning from 10.0.4.1 through 10.0.4.254.
Subnetting rules dictate that all devices on the same physical broadcast domain must share the same network identifier.
2
Evaluate the configured default gateway address against the subnet boundary.
The IP address 10.0.5.1 belongs to the 10.0.5.0/24 network segment, which is outside the host's local subnet (10.0.4.0/24).
A host cannot send packets directly to a gateway residing on a separate subnet without prior routing access.
3
Determine the required corrective action.
Assign a gateway IP address that falls within the 10.0.4.0/24 range (e.g., 10.0.4.1).
Aligning the gateway address within the host's subnet allows the Windows client to perform ARP requests and reach the local router interface directly.

Key Concept

IPv4 Subnet Boundaries and Default Gateway Alignment
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Topics

Windows Client Networking Configuration

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