Which diagnostic commands are commonly used to verify IP configuration and network reachability?

• A. Use FTP to test connectivity.
• B. Reboot the device.
• C. Use ping to test reachability to a known host, and traceroute to identify where traffic is failing.
• D. Change SSID and password.

Answer: (C)

Testing IP configuration and network reachability relies on commands that actively check connectivity and map the path to a destination. Ping sends ICMP echo requests to a known host and reports whether replies come back and how long they take, confirming the host is reachable and giving a feel for latency. Traceroute (or tracert) traces the route to the destination by showing each hop along the path and the time for each, helping you pinpoint where traffic might be failing or slowing.

Together, these tools let you verify that your device has proper IP connectivity to a target and identify where issues occur in the route. The other options don’t serve this purpose: using FTP tests file transfer, rebooting doesn’t diagnose connectivity, and changing the SSID/password is unrelated to verifying reachability.