ROCKY13 2010/02/03 18:59
The backbone of the
Internet consists of a
powerful set of telephone
lines including T3 lines,
capable of transferring
data at a very fast rate of
about 45 megabytes per
second. The lines link
metropolitan cities and
include national access
points or feeds. If you
imagine a geographic
map, they are equivalent
major highways, explaining
why the Internet is often
referred to as the
Information
Superhighway.
The backbone of the
Internet is operated and
maintained by various
companies and
organizations working
cooperatively without
centralized ownership.
Redundancy is built into
the backbone of the
Internet so that if one or
more major lines go
down, traffic can be
rerouted, much like a
traffic detour when a
highway is temporarily
under construction. While
this might slow Internet
traffic, it will not break
the Internet.
The backbone of the
Internet consists of a
powerful set of telephone
lines including T3 lines,
capable of transferring
data at a very fast rate of
about 45 megabytes per
second. The lines link
metropolitan cities and
include national access
points or feeds. If you
imagine a geographic
map, they are equivalent
major highways, explaining
why the Internet is often
referred to as the
Information
Superhighway.
The backbone of the
Internet is operated and
maintained by various
companies and
organizations working
cooperatively without
centralized ownership.
Redundancy is built into
the backbone of the
Internet so that if one or
more major lines go
down, traffic can be
rerouted, much like a
traffic detour when a
highway is temporarily
under construction. While
this might slow Internet
traffic, it will not break
the Internet.
ROCKY13 2010/02/03 18:59
While T3 lines provide the
backbone for the Internet,
smaller tributaries provide
local support by
establishing dedicated
lines that link into the
Internets backbone at
national access points.
Revisiting the map
analogy, these can be
equated with boulevards
and major streets that
lead to freeways. These
secondary lines are leased
and maintained by various
Internet Service Provider
(ISP) co-ops using routers
to direct traffic. But how
does a discreet
communication get from
your computer to a
website? Its all about
addressing and data
packets.
While T3 lines provide the
backbone for the Internet,
smaller tributaries provide
local support by
establishing dedicated
lines that link into the
Internets backbone at
national access points.
Revisiting the map
analogy, these can be
equated with boulevards
and major streets that
lead to freeways. These
secondary lines are leased
and maintained by various
Internet Service Provider
(ISP) co-ops using routers
to direct traffic. But how
does a discreet
communication get from
your computer to a
website? Its all about
addressing and data
packets.
ROCKY13 2010/02/03 19:00
Every computer
connected to the Internet
is assigned a unique
Internet Protocol (IP)
address. When you point-
and-click on a link, your
browser sends out a
request that is addressed
to the website that houses
the content you want.
Routers along the way
read the data packets
address and relay it along
the best route available.
When the data packet
arrives at the website, the
server reads the request
and sends the requested
page back to your
computer via a return
address in the data
packet: this is your
computers IP address.
The data packet is routed
back to you (in actuality,
several data packets) and
your browser interprets
the content and displays
the page for you. In
essence the Internet is
akin to a highway filled
with rushing data packets
versus cars.
Every computer
connected to the Internet
is assigned a unique
Internet Protocol (IP)
address. When you point-
and-click on a link, your
browser sends out a
request that is addressed
to the website that houses
the content you want.
Routers along the way
read the data packets
address and relay it along
the best route available.
When the data packet
arrives at the website, the
server reads the request
and sends the requested
page back to your
computer via a return
address in the data
packet: this is your
computers IP address.
The data packet is routed
back to you (in actuality,
several data packets) and
your browser interprets
the content and displays
the page for you. In
essence the Internet is
akin to a highway filled
with rushing data packets
versus cars.
ROCKY13 2010/02/03 19:00
The first whisperings of an
Internet-like network
reach all the way back to
Leonard Kleinrocks,
Information Flow in Large
Communication Nets
(1961), and J.C.R.
Licklider / W. Clarks, On-
Line Man Computer
Communication (1962).
Licklider then headed up
the U.S. Advanced
Research Projects Agency
(ARPA) to develop these
designs into what was to
become the Internet,
initially dubbed the
ARPANET. The U.S.
Department of Defense
(DoD) funded the project
in 1969, interested in
developing a non-
centralized, redundant
communication system
that could survive a
nuclear attack. The rest,
as they say, is history.
The first whisperings of an
Internet-like network
reach all the way back to
Leonard Kleinrocks,
Information Flow in Large
Communication Nets
(1961), and J.C.R.
Licklider / W. Clarks, On-
Line Man Computer
Communication (1962).
Licklider then headed up
the U.S. Advanced
Research Projects Agency
(ARPA) to develop these
designs into what was to
become the Internet,
initially dubbed the
ARPANET. The U.S.
Department of Defense
(DoD) funded the project
in 1969, interested in
developing a non-
centralized, redundant
communication system
that could survive a
nuclear attack. The rest,
as they say, is history.
#69 Phones/PCs/Apps
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