If you want to know what protocols are real alternatives, take a look at the second last column (IETF): https://docs.google.com/spreadsheets/d/1-UlA4-tslROBDS9

If you want to know what protocols are real alternatives, take a look at the second last column (IETF): https://docs.google.com/spreadsheets/d/1-UlA4-tslROBDS9IqHalWVztqZo7uxlCeKPQ-8uoFOU/ https://docs.google.com/spreadsheets/d/1-UlA4-tslROBDS9IqHal... (I didn't make that spreadsheet, but found it quite interesting when it was posted on HN a few weeks ago)