The Obsolete Idea of An "Internet Core"
The term "default-free zone" is sometimes confused with an "Internet core" or Internet backbone, but there has been no true "core" since before the Border Gateway Protocol (BGP) was introduced. In pre-BGP days, when the Exterior Gateway Protocol (EGP) was the exterior routing protocol, it indeed could be assumed there was a single Internet core.
That concept, however, has been obsolete for a long time. At best, today's definition of the Internet core is statistical, with the "skitter core" being some number of AS with the greatest traffic according to the CAIDA skitter measurements. The CAIDA measurements are constantly updated.
Read more about this topic: Default-free Zone
Famous quotes containing the words obsolete, idea and/or core:
“The sage belongs to the same obsolete repertory as the virtuous maiden and the enlightened monarch.”
—Mason Cooley (b. 1927)
“At each minute we are crushed by the idea and the feeling of time. And there are only two ways to escape this nightmare, Mto forget it: pleasure and work. Pleasure wears us out. Work fortifies us. Let’s choose.”
—Charles Baudelaire (1821–1867)
“For books are more than books, they are the life
The very heart and core of ages past,
The reason why men lived and worked and died,
The essence and quintessence of their lives.”
—Amy Lowell (1874–1925)