When Jayshree Ullal joined networking startup Arista Networks in 2008, the company had no revenue and fewer than 50 employees. Nearly two decades later, she has helped transform it into one of Silicon Valley's most successful networking companies and become one of the wealthiest self-made women in the United States.

When Jayshree Ullal joined networking startup Arista Networks in 2008, the company had no revenue and fewer than 50 employees. Nearly two decades later, she has helped transform…

Jayshree Ullal, ranked No. 7 on Forbes' America's Richest Self-Made Women list with a $6.8 billion net worth, has become a pivotal figure in internet-networking infrastructure.…