[Notes: Click images for higher resolution. This post was originally published on 12/3/10, then edited and repost-ed on 12/7/10.]
We all probably have some idea and opinion (depending on particular sources) about what is going on with WikiLeaks and the exposing of hundreds of thousands of classified US state documents. I'll keep my personal opinions private here. Technically it has been interesting to watch the cat and mouse game and I thought it would be good to diagram how DNS works.
EveryDNS.net, a U.S. DNS provider pulled WikiLeaks from it's database, claiming constant denial of service took the controversial site offline earlier today, claiming that the constant hacking attacks were so powerful that they were damaging its other customers.
What's DNS and why is it so important? I always describe DNS as basically an internet telephone book - it keeps track of site names (URLs) and the IP addresses of the servers hosting those sites. It is something that is not required to access websites but makes it a lot easier because users only have to remember site names and don't have to remember long IP addresses. You get access to DNS with a web connection from your provider. There are also some good alternative DNS providers you can access as long as you have an internet connection. Here's a diagram I made up showing how it works.
Is DNS required to access websites? No. You can still get to a site by typing in the IP address of the site.
I've got an earlier post on DNS linked here that you may also find interesting.
Friday, December 3, 2010
WikiLeaks and DNS
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Gordon F Snyder Jr
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8:00 AM
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Labels: Education, Privacy, Security, technician, Technology
Thursday, December 2, 2010
FCC Chairman - Net Neutrality Proposed Rules
I've written here in the past about Net Neutrality and the issues. Yesterday, FCC Chairman Julius Genachowski announced a set of proposed rules to protect the open Internet. Here's a summary of Genachowski's announcement with pieces taken from a post by Nick Farrell:
- Genachowski will present the principle that broadband companies shouldn't block or degrade rival web content, services or applications to a vote that will be held on 21 December.
- The compromise rules in theory mean that US Internet users can use peer-to-peer software and see whatever websites they like and use any equipment they like on their cable or DSL connections.
- Carriers and ISPs will be barred from slowing down or blocking content from competitors. The ISPs will also have to be transparent about how they manage congestion on their networks to ensure that anti-competitive behavior isn't being disguised.
According to Farrrell, Genachowski has the support of Cisco CEO John Chambers, AT&T senior executive VP Jim Ciccono, and Comcast EVP David Cohen. The Communication Workers of America is also in support with a petition you can sign here. Not everyone thinks it goes far enough though. Sascha Meinrath, director of the New America Foundation's Open Technology Initiative has a post over at Wired. Here's a quote from Meinrath's piece:
Without fundamental changes to the current order, the Chairman’s proposal will be a great victory for the largest telecom corporations and a sound defeat for those working to support innovation and the economic vibrancy that an open Internet facilitates. The New America Foundation is hopeful that the Chairman’s office and Commissioners that support open Internet rules will develop a final order that uphold the FCC’s responsibility to protect consumers and Internet freedom.
In order to take effect, the proposal must be approved by a majority of the five FCC commissioners . Here's how Wireless Week breaks down that vote if it were to happen today.
- There’s no way Genachowski will vote against a proposal he himself introduced and has fought so hard for. He's a YES.
- Michael Copps issued the most carefully-worded statement of the bunch, but so far he’s been a big proponent of Genachowski’s net neutrality push and it’s unlikely he’ll back out now. Also a YES.
- Mignon Clyburn seemed to be in favor of the plan, saying “clear rules of road are absolutely necessary.” Another YES.
- Meredith Baker and Robert McDowell came out against the idea in comments filed today. That is two NOs.
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Gordon F Snyder Jr
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8:37 AM
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Labels: broadband, Digital, Divide, Education, technician, Technology
Wednesday, December 1, 2010
Simulation and Modeling in Technology Education (SMTE) Project
Work continues on the SMTE Project. Here's a video giving a brief overview of the Survival Master game, Physical Modeling Curriculum and Hybrid Model.
Follow along via the project website at http://gaming2learn.org/
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Gordon F Snyder Jr
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6:09 PM
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Labels: Education, Gaming, High School, SMTE, Students, Technology
Sunday, November 28, 2010
Verizon and Rural Fixed 4G LTE Wireless
The turkey's just about gone at our house, transitioning from a Thanksgiving Day bird to turkey sandwiches, turkey salad, turkey chili and maybe (just maybe) some turkey soup. It was a nice relaxing holiday and like most people, I enjoyed watching some football on Thanksgiving day - it was especially good this year because the New England Patriots were playing the Detroit Lions. Go Pats!
During the game on Thursday I found one commercial particularly interesting - the new one from Verizon Wireless 4G LTE (Long Term Evolution). If you have not seen it - here it is.
What's so interesting?
- The commercial is rural focused - no fancy city slicker stuff here and no mobile/cell phones are shown. What looks like an old farm that could have been taken out of the 1940's - the kind of location telcos like Verizon have avoided or, at most, have been trying to push low bandwidth DSL service to.
- The farm in the commercial looks like it only has electrical power strung on poles - take a look around 6 seconds into it - there are some poles running down a very long driveway. I only see one cable and it looks like power to me. I guess they could be telephone wires or the copper could be buried for phone service.
Picking the commercial apart here's what I see for today and the future:
- Verizon will be pitching LTE as a both a mobile and a fixed service. Fixed service will be pushed especially in rural areas where other broadband options are not available. LTE won't just be for mobile devices and the commercial makes this clear.
- Initially fixed voice and data services will be available but in time, we'll likely see a video service being sold. But - with all of the major networks streaming now along with companies like Hulu and Netflix delivering online content - the line is rapidly blurring between data and video services.
- Can video be delivered over LTE - yes. There are capacity issues when it comes to the number of cell towers and backhaul fiber that needs to be run to the towers to handle the load. Over time this will be taken care of. I think we'll see something similar to the Optical Network Terminals (ONT's) used for FiOS installed in people's homes - they will be called WNT's (Wireless Network Terminals) or something like that.
- Verizon FiOS is basically finished - what's there and in the process of being negotiated is there. Nothing more at least from Verizon when it comes to fiber to the home (FTTH). For now. the push is wireless.
Living in rural New England with only one broadband option I'm pretty excited about the kind of competition LTE is going to bring. When it comes to the Patriots though - I'm not real excited about the competition those New York Jets are bringing - they are a really good team!
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Gordon F Snyder Jr
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9:14 AM
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Labels: 4G, broadband, Education, Rural, technician, Technology, Wireless
Wednesday, November 24, 2010
This is a temporary demo video for the Survival Master game for STEM learning - Knowledge and Skills Builder 2B - Catapult level. In the video the learner uses Heat Flow knowledge to negotiate the single-player platformer gameplay. This is a first playable temp build.
You can follow along via the project website at http://gaming2learn.org/
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Gordon F Snyder Jr
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9:53 PM
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Labels: Computers, Education, Gaming, High Schools, SMTE, Students, Technology
Win a $100 Amazon Gift Certificate & Help Out Our NSF Center
Last week we launched a 3 minute survey - complete it and you will be entered into a monthly $100 Amazon gift certificate.
You can enter using your Facebbook or Twitter ID, email address, phone number, etc. You can also fill out the survey without giving any contact information - you just won't be eligible for the raffle.
We promise not to spam you - we only need this information to contact you if you are a winner.
If you could take a few minutes to describe who you are and how you are using our National Science Foundation material (blog, web site, following on Twitter, YouTube, podcast, etc.) it would really help us out.
Thanks and Happy Thanksgiving!
Gordon
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Gordon F Snyder Jr
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4:23 PM
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Monday, November 22, 2010
Simulation and Modeling in Technology Education (SMTE) Project
This is a temporary demo video for the Knowledge and Skills Builder level 2A - the "Delta T Challenge" in the Survival Master game for STEM learning.
You can follow along via the project website at http://gaming2learn.org/
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Gordon F Snyder Jr
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6:01 AM
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Labels: Computers, Education, Gaming, High Schools, SMTE, Students, Technology
