Public, Broadband Internet vs. Private, Leased Lines.

/ to be done. /

Things to be considered:
1. Communication speed (especially minimal guaranteed speed),
2. Communication Security (DDOS, Sniffing/MITM by insider threats in public internet, attacks on DNS services in public internet, passive (sniffing) and active (MITM) wiretapping in both public internet and private lines, perhaps more; importance of strong encryption (not only key length), routing/traffic monitoring, and endpoint security).
3. Costs.
4. Other limits (private connection only between two endpoints per line, vs possible connection to any endpoint available in the public internet from our endpoint in classic, broadband internet).