220-802 · Question #177
A user calls the helpdesk and states that they suddenly cannot connect to the Internet or any other network resources. The user is on a company network that uses DHCP. The technician runs IPCONFIG…
The correct answer is A. Check the network cable. An IP address of 0.0.0.0 indicates the NIC was completely unable to communicate with the DHCP server - it could not even obtain an APIPA address (169.254.x.x), which would occur if DHCP is unavailable but the physical connection is intact. An address of 0.0.0.0 strongly…
Question
A user calls the helpdesk and states that they suddenly cannot connect to the Internet or any other network resources. The user is on a company network that uses DHCP. The technician runs IPCONFIG from the command prompt and the PC has an IP address of 0.0.0.0. Which of the following steps should the technician perform FIRST to troubleshoot this issue?
Options
- ACheck the network cable
- BReplace network card
- CAssign a static IP address
- DReinstall the network drivers
How the community answered
(64 responses)- A83% (53)
- B3% (2)
- C5% (3)
- D9% (6)
Explanation
An IP address of 0.0.0.0 indicates the NIC was completely unable to communicate with the DHCP server - it could not even obtain an APIPA address (169.254.x.x), which would occur if DHCP is unavailable but the physical connection is intact. An address of 0.0.0.0 strongly suggests a physical layer (Layer 1) problem, most commonly a disconnected, damaged, or unplugged network cable. Following the CompTIA troubleshooting methodology, you should always start with the simplest, most likely physical cause before escalating to more complex solutions. Replacing the NIC, assigning a static IP, or reinstalling drivers are all premature steps if the cable is simply unplugged or faulty.
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