What is a network packet broker (NPB)? A network packet broker is a technology that implements a range of monitoring tools to access and analyze traffic (also known as “network packets”) across a network. Simply put, NPBs function as ‘brokers’ (or managers) of network traffic. The packet broker collects traffic from multiple network links, filtering and distributing each individual packet to the correct network monitoring tool. By doing so, network packet brokers ensure improved effectiveness from network monitoring and security tools, by delivering improved data from across the network.