Operation Integer 
getDeviceNodeUsed (String devicename, String system_name), in Class Device
Documentation
tells if the device will be used in the current running mode
0 means it will be used (default value)
-1 not used (excluded)
importnat to generate routing tables, dhcp config file
| Protocol | | Qualification | |
| Exceptions | | Size | |
| Time | | Concurrency | Sequential |
| Export Control | PublicAccess | | |