This function returns the service associated with port for the
specified protocol as per '/etc/services'.
Parameter
integer $port - port to check
string $protocol -
access protocol
Return value
string -
name of service running on the port
Note
This function can be called
statically.
The name of the service is retrieved from the machine where
Net_Portscan is executed, not from the
remote host, which you possibly used in
Net_Portscan::checkPort().
