What is network visibility and packet broker?

Network visibility is the ability to monitor, analyze, and manage all traffic flowing through a network — essential for security monitoring, performance management, and compliance. As networks grow and traffic volumes increase, capturing and analyzing all traffic becomes challenging. A Network Packet Broker (NPB) aggregates, filters, and distributes network traffic from multiple monitoring points (TAPs and SPAN ports) to the appropriate monitoring tools (IDS/IPS, performance monitors, forensics). Without an NPB, each monitoring tool needs its own connections to every network segment — expensive and complex. NPBs provide: traffic aggregation (combine multiple 10G feeds into one 40G or 100G tool feed), filtering/slicing (send only relevant traffic to each tool — e.g., VoIP to quality monitors, HTTP to DLP), load balancing (distribute traffic across multiple tool instances), deduplication (remove duplicate packets from multiple capture points). Network TAPs (Test Access Points) passively copy all traffic without affecting the network (unlike SPAN ports, which can drop packets under load). NPBs from Gigamon, Ixia, and APCON are used in enterprise and carrier security architectures.