unknown: list before sort/uniq unknown: 168.100.3.2 unknown: 168.100.3.2 unknown: 168.100.3.1 unknown: 168.100.3.3 unknown: 168.100.3.3 unknown: 168.100.3.3 unknown: 168.100.3.4 unknown: 168.100.3.1 unknown: 168.100.3.4 unknown: list after sort/uniq unknown: 168.100.3.1 unknown: 168.100.3.2 unknown: 168.100.3.3 unknown: 168.100.3.4