 In case the above-mentioned protocols are not enabled (for example due to incompatibilities between the network devices or for security reasons) the topology can be defined manually.A record is maintained of the IP addresses and ports each node has used.Netdisco was created at the University of California, Santa Cruz (UCSC), Networking and Technology Services (NTS) department in 2003 by Max Baker, with significant contributions from Mark Boolootian and Jim Warner (through whose ideas Netdisco was born and shaped), Bill Fenner, and Eric Miller.