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Home > Archive > i-NET+ > August 2000 > Internet backbone
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| Anyone know what the answer to this question is? I think ATM, but could be wrong.
Which Internet bandwidth technology is mainly sed on the Internet backbone? | |
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| ATM is correct. It's the "core" of the internetwork, to use Cisco's term . . . speed and reliability is what counts there. | |
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| I don't think ATM is the correct answer. When you look at http://www.webopedia.com you will find that T3 lines are mainly used for the backbone. I looked this one up because I was not sure which one to pick. | |
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| I tend to go with the T3 answer. If I may be permitted to quote from a reference, i-Net+ For Dummies, page 226-227:
"The backbone of the internet - that is, all the various infrastructure backbone segments combined - is created from fiber-optic cabling. In the United States, fiber optic cable uses the communications standard Synchronous Optical Network (SONET) and in Europe, it uses the Switched Digital Hierarchy (SDH) standard. These standards allow the fiber-optic networks (backbones) of the various carriers and NAP's to interconnect and interoperate with one another, thus creating the Internet's infrastructure and backbone. The internet backbone currently operates at 155Mbps bandwidth - it's next evolution, the vBNS (very high-speed Backbone Network Service) will operate at around 622 Mbps."
Now, ATM (fixed connection, cell-switching technology) transmits cells at either 155.52 Mbps or 622.08 Mbps. So, what is the correct answer to Dude's question? I suppose it could be either, but I think that CompTIA is looking at T3.
Sorry to be so long winded. Hope this sheds a little more light on the subject.
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Rick i-Net+ |
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