The Internet is a
WAN which spans
the entire globe: it is the largest computer network in existence.
The phrase `internetworking' refers to connecting separate networks to
build a larger one, hence `The Internet' is the connection of a whole
pile of subnetworks.
So now we look at the list above and ask ourselves: what is the Internet's size, physical details and protocols?
The size is already established above: it's global.
The physical details are varied however: each little sub-network is connected differently, with a different layout and physical nature. Attempts to map it in a useful way have generally met with abject failure.
The protocols spoken by each link are also often different: all of the link-level protocols listed above are used, and many more.
So now we look at the list above and ask ourselves: what is the Internet's size, physical details and protocols?
The size is already established above: it's global.
The physical details are varied however: each little sub-network is connected differently, with a different layout and physical nature. Attempts to map it in a useful way have generally met with abject failure.
The protocols spoken by each link are also often different: all of the link-level protocols listed above are used, and many more.
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