What are the three parts of a LSN? I am curious about what the 3 parts of a Log Sequence Number (LSN) are and how they are generated.

A log sequence number is an ever-increasing, three-part number that uniquely defines the position of a log record within the transaction log. Source

I looked around a bit, and found at least one answer that said I should &quot;not be concerned with how these are generated&quot; but I still want to know.
If I run DBCC FILEHEADER ([AdventureWorks2014], 1) I get results that show me some important LSN's in my AdventureWorks

MaxLSN
45000000001600001
FirstLSN
44000000084000074
RedoStartLSN
45000000001600001

They do seem to have 3 distinct parts, what are they, what do they mean, and how are they generated?
According to Paul Randal in his Pluralsight course "SQL Server: Logging, Recovery, and the Transaction Log" the LSN is composed of three parts:


1) VLF sequence number (4 bytes) 
2) Log block number (4 bytes) 
3) Log record number (2 bytes)