N10-005 · Question #720
A technician is troubleshooting a network connectivity issue on a laptop. The technician wants to verify the NIC is functioning on the laptop. Which of the following commands should the technician…
The correct answer is A. ping 127.0.0.1. Pinging the loopback address 127.0.0.1 verifies that the local TCP/IP stack and NIC are functioning without requiring any external network connectivity.
Question
A technician is troubleshooting a network connectivity issue on a laptop. The technician wants to verify the NIC is functioning on the laptop. Which of the following commands should the technician use?
Options
- Aping 127.0.0.1
- Bping 169.254.0.1
- Ctracert 192.168.0.1
- Dnslookup 10.4.0.1
How the community answered
(48 responses)- A94% (45)
- B2% (1)
- D4% (2)
Why each option
Pinging the loopback address 127.0.0.1 verifies that the local TCP/IP stack and NIC are functioning without requiring any external network connectivity.
The address 127.0.0.1 is the IPv4 loopback address; pinging it sends packets through the local network stack and NIC driver without placing traffic on the physical network. A successful reply confirms that the NIC hardware and TCP/IP stack are operational on the local device.
169.254.0.1 is an APIPA address used when DHCP fails; pinging it does not reliably test the NIC or loopback functionality and is not a standard diagnostic step for NIC verification.
tracert to a gateway tests the network path to an external host, which requires the network to be partially functional and does not isolate whether the NIC itself is working.
nslookup tests DNS name resolution, which depends on network connectivity and a reachable DNS server, and does not directly test whether the local NIC is functioning.
Concept tested: Loopback address to verify local NIC and TCP/IP stack
Source: https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/ping
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