Source : Free On-Line Dictionary of Computing

remote monitoring
     
         (RMON) A {network management} {protocol} that
        allows network information to be gathered at a single
        computer.  Whereas {SNMP} gathers network data from a single
        type of {Management Information Base} (MIB), RMON 1 defines
        nine additional MIBs that provide a much richer set of data
        about network usage.  For RMON to work, network devices, such
        as {hubs} and {switches}, must be designed to support it.
     
        The newest version of RMON, RMON 2, provides data about
        {traffic} at the {network layer} in addition to the {physical
        layer}.  This allows administrators to analyse traffic by
        protocol.
     
        (2003-09-15)