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SK0-003 · Question #772

A technician prints out the following server NIC configuration: - IP192.168.0.1 - NETMASK 255.255.255.0 - GATEWAY192.168.0.254 - DNS1169.254.1.2 - DNS2169.254.2.1 Which of the following is the MOST…

The correct answer is B. Wrong DNS addresses. The server's network configuration shows DNS servers with APIPA addresses, which prevents it from resolving external hostnames needed for operating system updates.

Troubleshooting

Question

A technician prints out the following server NIC configuration:

  • IP192.168.0.1
  • NETMASK 255.255.255.0
  • GATEWAY192.168.0.254
  • DNS1169.254.1.2
  • DNS2169.254.2.1

Which of the following is the MOST likely cause why the server is unable to download operating system updates?

Options

  • AWrong Netmask
  • BWrong DNS addresses
  • CWrong Gateway
  • DWrong IP address

How the community answered

(37 responses)
  • A
    8% (3)
  • B
    76% (28)
  • C
    14% (5)
  • D
    3% (1)

Why each option

The server's network configuration shows DNS servers with APIPA addresses, which prevents it from resolving external hostnames needed for operating system updates.

AWrong Netmask

The Netmask 255.255.255.0 is appropriate for a /24 subnet and is consistent with the IP address 192.168.0.1, making it a valid configuration for a local network.

BWrong DNS addressesCorrect

The DNS addresses configured (169.254.1.2 and 169.254.2.1) are Automatic Private IP Addressing (APIPA) addresses. APIPA addresses are self-assigned by devices when they cannot obtain an IP from a DHCP server and are specifically not routable on the internet, which means the server cannot resolve public domain names required to download operating system updates.

CWrong Gateway

The Gateway 192.168.0.254 is a valid IP address within the 192.168.0.x subnet, suggesting a correct configuration for routing traffic outside the local network.

DWrong IP address

The IP address 192.168.0.1 is a valid private IP address within the specified subnet and works correctly with the given netmask and gateway for local network communication.

Concept tested: APIPA addresses and DNS resolution

Source: https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/automatic-private-ip-addressing-apipa

Topics

#Network configuration#DNS#APIPA#Troubleshooting connectivity

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