![]() Q: Is the 2nd edition much changed from the first? The idea is to help people understand it deeply not limited to the simplistic good or bad, but taking apart a protocol into the various problems it’s trying to solve and evaluating various ways of resolving each problem. So I wrote the book as a friendly way to learn about the field. I can’t imagine trying to understand the technology under these conditions, essentially from the specifications alone. It was a situation where anything coming out of committee X had to be bad and anything coming out of committee Y had to be good. There also was a disturbing trend to treat the field as religion, where you weren’t allowed to question or look at certain things critically. Some big mistakes were made, and then patched. Decisions were based on politics rather than understanding the implications of protocols. Committees reinvented the same stuff, with new terminology. Also, the field was getting more and more confusing. This was a natural topic for me to write about. I used to be the routing architect at Digital Equipment Corp., and it was my work that formed the basis of today’s routing and bridging protocols. She talks about her new book and shares the surprising story behind the invention of the spanning tree algorithm as well as its poetic counterpart, the algorhyme. ![]() In the following interview, Perlman reveals her ability to frame this complex and fascinating technology in reader-friendly terms. The new edition of Radia Perlman’s bestselling book, Interconnections, encompasses the many changes in the networking field since the first edition was published in 1992. Radia Perlman The Poetry of Protocols Radia Perlman Discusses Interconnections ![]() They should have called it a multi-access link. Wonderful technology, but I’m annoyed at the inventors for calling it a network. To have a router move your data, you need to cooperate with it… Then along came the Ethernet. So the right question is “why do we use to layer 3 protocols?” The answer is subtle and leads to discussion of how Ethernet became a “layer 3” protocol, and evolution to TRILL and other overlay networks.In the beginning there were routers. For instance, why do we need both Ethernet and IP? The “obvious” answer is that IP is “layer 3” and Ethernet is “layer 2”, but in fact, once Ethernet stopped being a single wire (layer 2), and something that is forwarded (layer 3’s job) it became a layer 3 protocol. So much of what “everyone knows” about network protocols is, actually false. The main point of this lecture is to encourage critical thinking. She is a member of the National Academy of Engineering and is inducted into the internet Hall of Fame, and the inventor Hall of Fame. She has received numerous awards including lifetime achievement awards from ACM’s SIGCOMM and Usenix. She wrote the textbook Interconnections, and co-wrote the textbook Network Security. She has made many contributions to the fields of network routing and security protocols including robust and scalable network routing, spanning tree bridging, storage systems with assured delete, and distributed computation resilient to malicious participants. Radia Perlman received her PhD in EECS from MIT and is currently a Fellow at EMC. This talk will demystify these, as time follows. There are also buzzwords such as “SDN”, and fads such as “active networks” and “information-centric networking”. So the right question is “why do we use to layer 3 protocols?” The answer is subtle and leads to discussion of how Ethernet became a “layer 3” protocol, and evolution to TRILL and other overlay networks. Unique opportunities for Align students bring new CS perspectives to Amazon Web Services.Įxplore our research presented at the CHI Conference. Align Students Bring New CS Perspectives to AWS.Keep up to date with the latest news from Khoury.īreak into tech, without a computer science background.īe at the forefront of CS research and education. News: Past, Present, Future: Khoury College Comes Together to Conclude 40th Anniversary Celebration. ![]()
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