What does Internet access, really mean?
Internet access refers to the method by which your computer connects to
the Internet. Access is provided by companies called Internet Service
Providers or ISPs. In addition to connectivity itself, ISPs
also provide a variety of Internet-related services such as email and
Web hosting, but Internet access is the main service. Internet access
can be generally categorized into two categories:
1.Low Throughput Rate Connections (Low-Speed or Telephone Dial-Up access)
2.High Throughput Rate Connections (High-Speed or Broadband access)
What does throughput rate mean?
This is the amount of data transferred from one place to another in a
specified amount of time. Since an Internet connection is sending data
from a Web site to your computer, how fast an Internet connection
is, is reflected in its throughput rate. Typically, throughputs are measured
in units called Kbps and Mbps.
What are Kbps and Mbps?
The b stands for bits per second and the K
and M refer to how many bits of data are transferred each second
over a connection.
Kbps refers to kilobits per second (1,000 bits per second).
Mbps refers to megabits per second, (1 million bits per second,
or 1,000 Kbps).
Can you further explain low throughput rate or dial-up
access?
A low throughput rate or basic dial-up modem connection is when a computer
is connected to the Internet via a modem and a public telephone network.
This access is really just like a phone connection, except that the parties
at the two ends are computer devices rather than people. Because dial-up
access uses public telephone lines, the quality of the connection is not
always good and data rates are quite limited.
Even though the modem is 56K, the maximum data rate available with basic
dial-up access is 53 Kbps due to FCC regulations. But this rating is under
ideal conditions with updated phone connections and close access to major
communications switches. In rural areas, where old copper lines are often
still utilized and where major telecommunications hubs are not local,
data rates are typically less than 30Kbps and often less than 15Kbps.
At these low speeds, popular Internet site pages such as MSNBC.com and
CNN.com can take 15 to 20 seconds or more to load. Downloads of material
that has a lot of data or graphics can take many minutes or sometimes
an hour or more. For example, one Midwest farmer told us recently that
it took 20 minutes to download a weekly electronic newsletter over his
local telephone line. After he subscribed to Agristar Global Networks it took 50 seconds.
What else should I know about high throughput rate or broadband
access?
Unlike low-speed connections over standard telephone connections, there
are several methods to obtain high-speed or broadband Internet access.
These are:
1.Cable: A cable Internet modem uses the same coaxial cable a cable company
uses for TV signals to transmit data. Because coaxial cable provides much
greater bandwidth than telephone lines, a cable modem can be used to achieve
extremely fast access to the World Wide Web. Cable Internet access is
the most popular method of broadband connection in urban areas because
of its easy set-up and speeds that are typically the fastest connection
a consumer household can achieve today. Downstream connection rates usually
range between 1 and 1.5 Mbps. However, cable Internet access is rarely
available in areas outside of cities and towns, and thus not an option
for farm and ranch operations, rural businesses or others living in a
rural area.
2.DSL: Digital subscriber line Internet access is the second-most-popular
type of broadband service in the United States. DSL technology uses sophisticated
modulation schemes to pack much greater data loads onto existing telephone
wires. DSL offers downstream speeds that typically are between 128 Kbps
and 512 Kbps for households. A limiting factor of DSL is that performance
degrades as the distance between a site and the central DSL office increases.
Service generally is unavailable to locations further than 20,000 feet,
or about 4 miles, from a central office. It is thus not an option for
farm operations.
3.Satellite: Two-way satellite Internet access, which is Agristar Global
Networks connectivity system, utilizes the same downstream connection
frequency that satellite TV broadcasters use. Data is transmitted via
geosynchronous satellites orbiting 22,300 miles above the earth. A small
microwave transmitter sends information back up on the return channel.
Two-way satellite Internet connectivity has been available to consumers
since the mid-2001. It is available anywhere in the continental United
States, with the only criteria being that there is a clear view of the
southern sky from some part of the property near the home or business.
Downstream speeds typically range from 400 Kbps to 700 Kbps. The return
channel is normally between 30Kbps and 60Kbps. However, because Internet
surfing and downloading speed is far more important to most users, and
the upstream connection used primarily for sending low-data site requests,
Two-way satellite delivery is an excellent and cost-effective Internet
solution for rural locations unable to connect via DSL and Cable.
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