Viavi Solutions Inc. (VIAV) stock surged as much as 19.12% in pre-market trading on Friday, following the company's impressive fiscal second-quarter 2025 results and an optimistic outlook for the third quarter.

The network test and monitoring solutions provider reported adjusted earnings per share of $0.13 for the quarter ended December 2024, surpassing the consensus estimate of $0.10. Revenue of $270.8 million also topped analysts' expectations of $259.99 million, driven by a strong recovery in demand for its Network Enablement products.

Viavi's Network Enablement segment, which includes products for fiber optic network deployment and maintenance, saw a 15.1% year-over-year increase in revenue to $199.9 million. The company attributed this growth to the ongoing expansion of 5G networks and the increasing demand for high-speed internet connectivity. Additionally, Viavi provided an upbeat outlook for the third quarter, projecting revenue between $276 million and $288 million and non-GAAP earnings per share in the range of $0.10 to $0.13, exceeding analysts' expectations.