I usually hear about SNMP v2c. But recently I came across v2u when configuring an SNMP agent.
What are the differences between the SNMP v2 flavors v2c and v2u?
And which is the more recent version among these two?
SNMP 2u offers per-user authentication, similar to SNMPv3. SNMPv2u never really took off in the wild; anyone who wants per-user authentication uses SNMPv3. For more details (and there are a lot, consider this article in the Simple Times.
That said, I'm not even sure how many agents support SNMPv2u; however it isn't many if they do. NET-SNMP doesn't even have an option for