Archive for the 'Routing' Category

‘academic’ thoughts about a ‘future Internet’

Monday, October 12th, 2009 by kc claffy

This post is our submitted response to NSF’s call for expressions of interest in the Future Internet Architectures summit, which i am attending this week.

What scientific contributions will you bring to the discussion about Future Internet architectures?

As scientists, we are compelled to explore how the peculiar structure relates to the function(s) of complex networks. Many complex networks in nature share the peculiar structural character of the Internet, but they also manifest phenomenal behavior: they efficiently route information without any observable routing protocol overhead. This achievement is currently beyond the reach of man-made networks. The Internet still uses a 30-year old routing architecture with fundamentally unscalable overhead requirements.  Yet in those 30 years, the Internet’s inter-domain topology has evolved toward a structure for which nature has superior routing technology, if only we can figure out how to use it!


spoofer: measure your network’s hygiene!

Sunday, April 5th, 2009 by kc claffy

Update: In May 2015, ownership of Spoofer transferred from MIT to CAIDA

We are studying an empirical Internet question central to its security, stability, and sustainability: how many networks allow packets with spoofed (fake) IP addresses to leave their network destined for the global Internet? In collaboration with MIT, we have designed an experiment that enables the most rigorous analysis of the prevalence of IP spoofing thus far, and we need your help running a measurement to support this study.

This week Rob Beverly finally announced to nanog an update to spoofer he’s been working on for a few months. Spoofer is one of the coolest Internet measurement tool we’ve seen in a long time — especially now that he is using Ark nodes as receivers (of spoofed and non-spoofed packets), giving him 20X more path coverage than he could get with a single receiver at MIT.


what percentage of traffic on the Internet is peer-to-peer file sharing?

Sunday, February 8th, 2009 by kc claffy

I get this question as often as I get any question about the Internet. finally, a visiting intern Mia Zhang from Beijing Jiaotung University has done a thorough literature roundup, extracting the best available data pertinent to this question that she could find in the public domain.

(more…) covers caida’s recent work in Nature

Wednesday, January 14th, 2009 by kc claffy

As a follow-up to the recent press flurry about Dima’s routing research, Voice of San Diego interviewed us for several hours last week, and no doubt spent twice that time focused on trying to get a complex story mostly right. Hyperbolic headlines notwithstanding, the journalist who interviewed us, David Washburn, did an outstanding job of fact-checking and making sure he accurately represented our views. If this is the future of journalism, I’m not the least bit worried about the death of 20th century journalism models. The real fourth estate is in good hands.

in (re)search of scalable routing..

Tuesday, January 6th, 2009 by kc claffy

I’ve written before about the growing consensus among experts that the Internet’s underlying communications routing algorithms are fundamentally unscalable, so I am delighted to have CAIDA’s routing research group led by Dima Krioukov achieve some fundamental routing research results worth extensive media coverage. We have not solved the Internet’s routing scalability problem, but these recent discoveries will help that cause.


internet telemetry, v6

Wednesday, December 10th, 2008 by kc claffy

i gave a (faster, less understandable) version of this talk (pdf or slides+audio quicktime) at the October 2008 ARIN meeting in Los Angeles (original October version) and again to ISOC’s advisory council meeting in November. motivation: the end of the current addressing architecture, with scant understanding of how to retain all its positive features in the face of inevitable change. a topic i worry about more each year.

(peter cincotti sings as if we knows what we’re going through.)

recommended reading in internet technology policy

Saturday, August 9th, 2008 by kc claffy

(gathered earlier this year upon a student’s request)

  1. Abatte, Janet. Inventing the Internet. 2000.
  2. Benkler, Yochai. The Wealth of Networks. 2006.
  3. Benkler, Yochai. Freedom in the COMMONS: Towards a Political Economy of Information., Duke Law Journal. 2003.
  4. Brin, David. Transparent Society. 1999.
  5. (more…)

top ten things lawyers should know about the Internet: #9

Friday, June 27th, 2008 by kc claffy

[Jump to a Top Ten item: #1 #2 #3 #4 #5 #6 #7 #8 #9 #10]

#9: The news is not all bad: there is a reason everyone wants to be connected to all the world’s knowledge — as well as each other — besides its status as the most powerful complex system ever created by man. The Internet’s practical promise for individual freedom, democratic engagement, and economic empowerment, is also unparalleled. This promise is sufficient inspiration for an open, technically literate conversation about how to invest in technologies and policies to support articulated social objectives.


top ten things lawyers should know about the Internet: #8

Saturday, May 10th, 2008 by kc claffy

[Jump to a Top Ten item: #1 #2 #3 #4 #5 #6 #7 #8 #9 #10]

#8: The opaqueness of the infrastructure to empirical analysis has generated many problematic responses from rigidly circumscribed communities earnestly trying to get their jobs done.


top ten things lawyers should know about the Internet: #6

Monday, April 21st, 2008 by kc claffy

[Jump to a Top Ten item: #1 #2 #3 #4 #5 #6 #7 #8 #9 #10]

#6: While the looming problems of the Internet indicate the need for a closer objective look, a growing number of segments of society have network measurement access to, and use, private network information on individuals for purposes we might not approve of if we knew how the data was being used.