Skip to Content
Alumni profile

Radia Perlman ’73, SM ’76, PhD ’88

Alumna’s network protocol revolutionized Ethernet.
August 23, 2016

“My designs were so simple people assumed I just had easy problems,” says Radia Perlman, a software designer, network engineer, and Internet pioneer. But in fact, the tough problems she solved helped create today’s Internet.

MIT prepared her for cutting through such complicated problems, she says. “I had a TA that I found very annoying. He gave zero credit for extra steps in a proof. That forced me to come up with clean solutions. All engineers could benefit from an annoying TA—it can help you in life to arrive at the clearest, simplest answers.”

Perlman’s simple, elegant solutions to networking problems have won her world acclaim. She developed the algorithm behind the spanning tree protocol that enabled Ethernet technology—once limited to a few hundred nodes confined in a single building—to create large networks of hundreds of thousands of nodes spread over a large area. She also invented fundamental components of network routing that have made networks connected via protocols, such as IP, far less fragile, more scalable, and easier to manage.

Perlman, who holds more than 100 patents, earned bachelor’s and master’s degrees in math and a PhD in electrical engineering and computer science. She attended MIT at a time when few women did, but she always felt she fit in. What matters as much as diversity of gender, she says, is the diversity of thought she found at MIT. “A team with different skills, talents, and outlooks is most effective,” she says.

As an undergrad, she worked part time at the MIT Artificial Intelligence Laboratory’s LOGO Lab, which developed the LOGO robotics language. There she developed TORTIS, a child-friendly version of LOGO used to teach children about computer programming. Perlman has worked at Digital Equipment Corporation and served as a fellow at Sun Microsystems and Intel Labs. Her many honors include being inducted into the Internet Hall of Fame and the National Inventors Hall of Fame. She also wrote Interconnections, a widely acclaimed textbook on networking, and coauthored a textbook titled Network Security.

Now a fellow at EMC, she lives in Redmond, Washington, with her partner, Charlie Kaufman, and is active in the MIT Alumni Club of Puget Sound. Her children are both MIT alumni: Dawn Perlner ’01 and Ray Perlner ’04. ­Perlman loves to cook and play the piano, and once, on a cruise to Siberia to view the solar eclipse, she performed stand-up comedy.

Keep Reading

Most Popular

open sourcing language models concept
open sourcing language models concept

Meta has built a massive new language AI—and it’s giving it away for free

Facebook’s parent company is inviting researchers to pore over and pick apart the flaws in its version of GPT-3

transplant surgery
transplant surgery

The gene-edited pig heart given to a dying patient was infected with a pig virus

The first transplant of a genetically-modified pig heart into a human may have ended prematurely because of a well-known—and avoidable—risk.

Muhammad bin Salman funds anti-aging research
Muhammad bin Salman funds anti-aging research

Saudi Arabia plans to spend $1 billion a year discovering treatments to slow aging

The oil kingdom fears that its population is aging at an accelerated rate and hopes to test drugs to reverse the problem. First up might be the diabetes drug metformin.

Yann LeCun
Yann LeCun

Yann LeCun has a bold new vision for the future of AI

One of the godfathers of deep learning pulls together old ideas to sketch out a fresh path for AI, but raises as many questions as he answers.

Stay connected

Illustration by Rose WongIllustration by Rose Wong

Get the latest updates from
MIT Technology Review

Discover special offers, top stories, upcoming events, and more.

Thank you for submitting your email!

Explore more newsletters

It looks like something went wrong.

We’re having trouble saving your preferences. Try refreshing this page and updating them one more time. If you continue to get this message, reach out to us at customer-service@technologyreview.com with a list of newsletters you’d like to receive.