Service assurance revenue rose 19.7% year over year during the quarter, while cybersecurity revenue increased 0.6%. Federal government revenue typically represents a mid- to high-single-digit percentage of total company revenue, Piazza said. Margins Expand as Revenue RisesProduct revenue increased 17.8% to $86 million, while service revenue rose 9.4% to $124.4 million. NetScout expects first-half revenue growth in the mid-single digits and second-quarter earnings-per-share growth in the high single digits. About NetScout Systems (NASDAQ:NTCT)NetScout Systems, Inc is a leading provider of network performance management, service assurance and cybersecurity solutions.