Network monitoring is one of the most fundamental responsibilities of a system administrator or network engineer. When traffic slows down, an application becomes unresponsive, or there's a suspicion of a security vulnerability, one of the first places we look is the network layer. At this point, we have two powerful tools, but with different philosophies: SNMP and NetFlow. The question of which is better is a debate I've heard in the industry for twenty years, and there's still no clear "this is