At a minimum, NI using Traceroute, SNMP, and CLI. You can optionally turn on TCP scanning (NMAP), NetBIOS scans, and Smart and Raw ping sweeps. A Smart ping sweep only sweeps if an IP has not been found in a discovered subnet.
Yes, a standalone NI appliance acts as Consolidator and Probe. However, once you have more than one NI appliance meaning you're going to distributed Consolidator and Probe model, then no, your Consolidator cannot also act like a Probe.