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Kieran | 24 days ago (raw) | root | parent | reply | flag +1 
 Tier 1 ISP's are the Internet backbone, they transit the most traffic and have the most connections.

Think HE, Cogent etc
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. | 23 days ago (raw) | root | parent | reply | flag 
 But where is/ what is the fountain head of "the internet" ?
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Owner_of_donky | 23 days ago (raw) | root | parent | reply | flag 
 They are the source of the internet
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. | 23 days ago (raw) | root | parent | reply | flag 
 Ok and what is it that source exactly?  A server farm or triplets having visions in a tub of lube?
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Owner_of_donky | 23 days ago (raw) | root | parent | reply | flag +1 
 Huge datacentres and many routers on multiple continents. Add to this the under water optic cables and you got the internet
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Kieran | 23 days ago (raw) | root | parent | reply | flag +1 
 There is no source it's just a bunch of companies who are connected together to form the Internet.
 
Then you also have ARIN/RIPE/APNIC these organisations control the allocation of Internet numbers in each region.