There are 10 different types of Anomaly Class ranging from Class 1 (easiest) to Class 10 (hardest).
Class 1 =Hideaway or Drone Cluster (easiest)
Class 2 =Burrow or Drone Collection
Class 3 =Refuge or Drone Assembly
Class 4 =Den or Drone Gathering
Class 5 =Yard or Drone Surveillance
Class 6 =Rally Point or Drone Menagerie
Class 7 =Port or Drone Herd
Class 8 = Hub or Drone Squad
Class 9 = Haven or Drone Patrol
Class 10 =Sanctum or Drone Horde (hardest)


Each Anomaly Class has 4 different level's ranging from Level 1 (easiest) to Level 4 (hardest).
Level 1 =Anomaly Class (easiest)
Level 2 =Hidden + Anomaly Class
Level 3 =Forsaken + Anomaly Class
Level 4 =Forlorn + Anomaly Class (hardest)