This Keysight World Tech Days India 2024 paper focuses on revolutionizing and securing vehicle networking through Automotive Ethernet, a critical technology for connected and autonomous vehicles. As modern vehicles integrate advanced driver assistance systems (ADAS), infotainment, and real-time data processing, robust and secure networking becomes essential. This paper explores high-speed Automotive Ethernet testing methodologies for latency, bandwidth, and cybersecurity, addressing challenges in ensuring reliable, secure in-vehicle communication. By highlighting case studies and best practices, we provide insights into developing resilient vehicle networks that meet safety, performance, and compliance standards for the next generation of intelligent transportation systems.