A S M, did you actually write this stuff yourself, or did you copy it from somewhere else? You oughta know plagiarizing isn't allowed here and moderators don't take kindly to it. If you snatched up these words from another place, you best cite your source and give the original writer their due credit.
Yes, I wrote it myself, you can check it. The only thing I took information about the principle of operation of GAP Limit from the Ledger website:
https://support.ledger.com/hc/en-us/articles/360010892360-Address-gap-limit?docs=trueBut I described his work in my own words