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Question

Difficulty: EasyWindows Client Networking Configuration

A Windows 11 workstation is configured to obtain an IPv4 address automatically. When the system boots while the local DHCP server is offline, Windows fails to receive an address offering and automatically assigns its own link-local address. Which of the following IP address blocks indicates that the workstation has configured itself with an Automatic Private IP Addressing (APIPA) address?

  1. 169.254.0.0/16169.254.0.0/16Answer
  2. B
    192.168.1.0/24192.168.1.0/24
  3. C
    127.0.0.0/8127.0.0.0/8
  4. D
    10.0.0.0/810.0.0.0/8

Answer

The address block 169.254.0.0/16169.254.0.0/16 is used by Windows for Automatic Private IP Addressing (APIPA).
When a Windows computer is configured for dynamic IP addressing (DHCP) but cannot communicate with a DHCP server, Windows automatically assigns an Automatic Private IP Addressing (APIPA) IP address in the reserved range of 169.254.0.0/16169.254.0.0/16. This allows local network communication between devices on the same physical link without internet access.

Step-by-Step Solution

1
Identify the client configuration state and failure scenario
The client is set to DHCP (dynamic) mode, but the DHCP server is unreachable.
When a Windows client cannot reach a DHCP server, Automatic Private IP Addressing (APIPA) generates a fallback IPv4 configuration.
2
Determine the reserved APIPA IPv4 address range
APIPA uses the IANA-reserved IPv4 block 169.254.0.1169.254.0.1 through 169.254.255.254169.254.255.254 (169.254.0.0/16169.254.0.0/16).
This allows communication with other host devices on the local subnet without requiring a DHCP server or manual setup.

Key Concept

Automatic Private IP Addressing (APIPA)
Estimated Time:45s
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Topics

Windows Client Networking Configuration

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