|  | 10.3 | Verifying Address Configuration
| 10.3.3 | The trace command
When you use the trace command as shown in the figure (output), host names are shown if the addresses are translated dynamically or via static host table entries. The times listed represent the time required for each of three probes to return. NOTE: trace is supported by IP, CLNS, VINES, and AppleTalk. When the trace reaches the target destination, an asterisk (*) is reported at the display. This is normally caused by a time out in response to one of the probe packets. Other responses include: !H -- The probe was received by the router, but not forwarded, usually due to an access list. P -- The protocol was unreachable. N -- The network was unreachable. U -- The port was unreachable. * -- Time out.