The primary purpose of using a Network Packet Broker (NPB) in a network infrastructure is to manage and control the flow of data traffic between different monitoring and security tools. An NPB collects data packets from many network links, filters them, and sends only the needed information to specific tools. This helps reduce the load on monitoring devices and improves their performance. By organizing and distributing network data efficiently, an NPB helps network administrators see what is happening in real time, find problems faster, and keep the network secure. It also avoids duplication of data and ensures that each tool gets the right type of traffic it needs to analyze. Overall, an NPB makes network management easier, faster, and more effective.