A network administrator suspects that a workstation might be communicating with an unknown server, possibly due to malware. Which command-line tool should the administrator use to display all active connections and listening ports to verify this suspicion?
netstat
tracert
ipconfig
ping
The correct tool is netstat, which lists active TCP connections and the TCP/UDP ports on which the computer is listening. This output lets an administrator spot unexpected or unauthorized communications that malware might create. ipconfig only shows network adapter configuration; ping checks host reachability; tracert traces the route to a destination. None of those reveal all current connections and listening ports like netstat does.
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