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Zorluk: KolayWired and Wireless Network Issues

A network technician executes the `ipconfig` command on a workstation after a user reports an inability to access network resources. The output indicates an IPv4 address of `169.254.18.92` with a subnet mask of `255.255.0.0`. Which of the following is the most likely cause of this issue?

  1. The workstation was unable to contact a DHCP server to obtain an IP configuration.Cevap
  2. B
    The DNS server is offline and failed to lease an IP address to the client.
  3. C
    The network interface card is connected to an unmanaged Layer 2 switch instead of a router.
  4. D
    The wireless access point has been misconfigured with overlapping 2.4 GHz channel frequencies.

Cevap

The workstation was unable to contact a DHCP server to obtain an IP configuration.
An IPv4 address beginning with `169.254.x.x` signifies that the computer self-assigned an Automatic Private IP Addressing (APIPA) address. This mechanism triggers when a device configured for dynamic IP addressing fails to establish communication with a DHCP server to receive network settings.

Adım Adım Çözüm

1
Analyze the IP address output from the command line tool.
The IP address is identified as `169.254.18.92`.
Recognizing the address space is necessary to pinpoint the protocol mechanism involved.
2
Correlate the IP range with operating system networking behaviors.
Addresses in the `169.254.0.0/16` range are designated for Automatic Private IP Addressing (APIPA).
APIPA is activated automatically by Windows operating systems when dynamic configuration fails.
3
Determine the root cause of APIPA activation.
The host system failed to receive a response from a reachable DHCP server.
DHCP server unreachability, network cable disconnection, or scope exhaustion prevents standard IP lease acquisition.

Anahtar Kavram

APIPA (Automatic Private IP Addressing) generation due to DHCP failure
Tahmini Süre:45s
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Konular

Wired and Wireless Network Issues

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