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