SK0-004 · Question #47
A system administrator is troubleshooting a network connectivity issue and runs ipconfig/all on the host. The command returns the following: IPv4 Address: 169.254.0.12 Subnet mask: 255.255.0.0 The…
The correct answer is A. ipconfig/release D. ipconfig/renew. An IPv4 address in the 169.254.0.0/16 range is an APIPA address, indicating the DHCP client failed to obtain a lease; releasing and renewing the IP address forces a fresh DHCP discovery.
Question
A system administrator is troubleshooting a network connectivity issue and runs ipconfig/all on the host. The command returns the following:
IPv4 Address: 169.254.0.12 Subnet mask: 255.255.0.0 The client is configured for DHCP. Which of the following commands should be run on the client to resolve this issue? (Select TWO).
Options
- Aipconfig/release
- Btracert
- Cipconfig/flushdns
- Dipconfig/renew
- Eipconfig/showclassid
- Fnslookup
How the community answered
(45 responses)- A71% (32)
- B13% (6)
- C2% (1)
- E9% (4)
- F4% (2)
Why each option
An IPv4 address in the 169.254.0.0/16 range is an APIPA address, indicating the DHCP client failed to obtain a lease; releasing and renewing the IP address forces a fresh DHCP discovery.
ipconfig /release sends a DHCPRELEASE message to the server (or clears the locally held APIPA address) so the client no longer holds any IP assignment, preparing it for a clean request.
tracert traces the route packets take to a destination and provides no mechanism to fix or renew an IP address assignment.
ipconfig /flushdns clears the local DNS resolver cache and has no effect on DHCP lease acquisition or IP address assignment.
ipconfig /renew sends a DHCPDISCOVER broadcast to locate a DHCP server and obtain a valid IP lease, which is the required step to move the client off the APIPA address and onto the correct network.
ipconfig /showclassid displays the DHCP class ID for an adapter and does not trigger any DHCP negotiation or address renewal.
nslookup is a DNS query tool used to resolve hostnames and has no role in obtaining or renewing a DHCP-assigned IP address.
Concept tested: Resolving APIPA address using ipconfig release and renew
Source: https://learn.microsoft.com/en-us/windows-server/networking/technologies/dhcp/dhcp-top
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