The semiconductor industry produces a wide range of devices, from tiny embedded processors to massive system-on-chip (SoC) designs. Historically, CPUs were generally the drivers for chips with the highest capacity and most complexity. Today, networking chips clearly vie for this title. The high speed, massive bandwidth and sophisticated protocols of modern networks place high demands on the design and verification of semiconductors for this application domain. This white paper focuses on the challenges of pre-silicon verification for networking SoCs, considers some options and describes a state-of-the-art solution that centers on the Synopsys ZeBu Server 4 emulator.