The Nodelist is the “glue” that holds the network together, similar to a telephone directory of names and numbers. The Nodelist is used by your Fidonet software to determine how to contact another system. Your Fidonet mailer usually comes with a “Nodelist compiler” to process these files.
The weekly Zone 1 NodeDIFF is the weekly differential for the traditional Zone 1 Nodelist. The differential file contains changes applicable to the Nodelist to be processed by your Fidonet software or Nodelist compiler. The Zone 1 NodeDIFF files are only applicable for the Zone 1 Nodelist. Differential files are not required if you use the Dailylist instead.
Please note that all Zone 1 Nodelists have embedded “watermarks” to ensure authenticity and proper publishing schedule.