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What is BROADBAND | Broadband Connection | Broadband Tutorial | Broadband basics | Throughput | ADSL - YouTube
Channel: ISO Training Institute
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so what is broadband you probably have an idea聽
of what the term is you probably use it every聽聽
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day but what is it are you able to define the聽
term broadband don't feel badly if you can't聽聽
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even though it's a common term that everybody uses聽
many people even information technology experts聽聽
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all have a hard time agreeing on what exactly聽
it means that said you probably have seen or聽聽
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heard the term broadband or its equivalents in聽
many contexts for example your local internet聽聽
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service providers are probably advertising聽
broadband or high-speed Internet access today聽聽
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other companies are advertising speed such as聽
4G LTE cellular carriers but simply broadband聽聽
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means fast as an fast internet access and it also聽
means faster than what I had yesterday there's聽聽
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no Universal definition that everybody agrees on聽
including engineers and government regulators but聽聽
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generally everybody agrees that broadband means聽
fast fast enough for example to stream music to聽聽
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stream video and to download large files quickly聽
but let's look at some of the formal definitions聽聽
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of broadband including the technology behind it聽
the federal government has a number to define聽聽
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broadband that number is 25 megabits per second聽
on the downlink there's another number associated聽聽
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with that that number is 6 megabits per second聽
on the uplink do those numbers mean anything to聽聽
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you unless you're a technical person and even then聽
they probably don't but these are the speeds the聽聽
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government says qualify something as broadband聽
but your broadband internet provider at home聽聽
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and your broadband cellular carrier probably聽
don't provide those speeds today but we'll聽聽
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have more on that later so what is broadband聽
after all that it sounds just about as clear聽聽
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as mud to me and it probably sounds about the聽
same to you so let's compare a few different聽聽
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broadband technologies what they are and how they聽
compare to help us figure it all out to compare聽聽
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different technologies you need to understand聽
how we measure speed for that we use the term聽聽
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throughput you probably use the term bandwidth聽
bandwidth and throughput mean pretty much the聽聽
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same thing for most purposes so whenever you think聽
about bandwidth just think about the word through聽聽
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foot to measure throughput we use a value called聽
bits per second or bps measuring bits per second聽聽
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is kind of like measuring the amount of water聽
flowing through a river just like a large river聽聽
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flowing very fast means you have a lot of water聽
having a large broadband pipe with lots of bits聽聽
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flowing at the speed of light means you have a lot聽
of data but now you're probably wondering what is聽聽
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a bit well you probably know that all digital聽
information is a sequence of ones and zeros聽聽
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everything the TV shows and movies you stream the聽
music saved on your phone every website you open聽聽
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in a browser all data is stored as a sequence of聽
ones and zeros these ones and zeroes are called聽聽
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for example ten ones and zeros is called ten聽
bits so what if I said you could send ten of聽聽
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those bits in one second how would you describe聽
that if that's right you would say that it's ten聽聽
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bits per second what you just described right聽
now that's throughput throughput is literally聽聽
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how many ones and zeros or bits someone can send聽
in one second so ten bits per second means we can聽聽
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send ten ones or zeros per second 1000 bits聽
per second means we can send 1,000 one zero聽聽
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zeros or 1000 bits per second let's review a聽
few different access technologies to help us聽聽
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figure out the term broadband dial-up internet is聽
definitely not broadband by today's standards but聽聽
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it's good to use as a baseline that you are聽
probably familiar with dial-up internet from聽聽
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the mid to late 1990s had a speed of about 56,000聽
bits per second or 56 kilobits you might remember聽聽
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the term 56k modem this is where that term comes聽
from that means a maximum of 56,000 ones or zeros聽聽
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are transmitted every second that isn't very聽
fast by today's standards but at one point it聽聽
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was pretty cutting-edge you wouldn't be able to聽
stream movies over a 56k connection though now聽聽
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let's look at a couple of technologies that would聽
actually count as broadband DSL broadband internet聽聽
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provided by your telephone company provides up聽
to about seven million bits per second or seven聽聽
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megabits that means seven million ones or zeros聽
are transmitted every second cable internet is聽聽
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about the same speed as DSL at least these days聽
where DSL is a lot faster than it used to be聽聽
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neither cable internet nor dsl or new technologies聽
both have been around since the 1990s however both聽聽
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technologies are always improving and they are聽
both definitely much faster than they used to be聽聽
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most people would call both technologies broadband聽
by today's standards because they are fast enough聽聽
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to download large files and stream multimedia聽
such as TV shows or live video fiber internet聽聽
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which has just recently been introduced to some聽
markets in the United States in about the last聽聽
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five years is very fast one billion bits per聽
second or one gigabit that is 1 billion ones聽聽
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or zeros transmitted every single second or over聽
100 times as fast as your DSL or cable now I don't聽聽
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know what you think is broadband but I'd say聽
that is definitely broadband how do cellular聽聽
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networks stand up 3G or third-generation cellular聽
networks were first built in the United States聽聽
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around 2003 and they still operate today while聽
different cellular carriers all used different聽聽
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technologies for data in 3G they all provided聽
about the same average through foot speed of聽聽
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about 1 million bits per second that's 1 megabit聽
by today's standards that's not broadband because聽聽
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you'd have a hard time streaming video or much聽
multimedia at all 4G or fourth generation cellular聽聽
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networks were built in the United States around聽
2010 and they continue to be built out today聽聽
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all major cellular carriers in the United States聽
today use a technology called LTE which stands for聽聽
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long term evolution LTE is an open global standard聽
for cellular voice and data networks LTE provides聽聽
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average throughput speeds of about 5 million聽
bits per second that's 5 megabits that doesn't聽聽
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sound very fast compared to your home internet聽
service and especially not very fast at all聽聽
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compared to fiber but remember cellular networks聽
communicate all of that information without wires聽聽
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everywhere you go and it's still pretty fast聽
suitable for streaming video carrying voice聽聽
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over LTE telephone calls and carrying billions聽
of social-media transactions every single day聽聽
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remember when I said that the federal government聽
has a number to define broadband remember that as聽聽
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of January 2015 that number is 25 megabits per聽
second according to the federal government for聽聽
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odd banned technologies have to let you download聽
25 megabits per second and to upload that means聽聽
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send out to the Internet 6 megabits per second聽
but most broadband providers today don't offer聽聽
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those speeds or at least most of their customers聽
don't have access to that level of service this聽聽
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includes the latest 4G cellular networks the only聽
technology that always meets this definition today聽聽
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is fiber internet which most people don't even聽
have access to where they live does that mean聽聽
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that your home internet service is not broadband聽
that is hard to say it probably doesn't meet the聽聽
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FCC's standard for broadband however the FCC's聽
benchmark for 25 megabits per second that's new聽聽
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as of 2015 as technology and networks continue聽
to improve they will probably catch up with the聽聽
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FCC's definition so what about today's newest聽
state of the art blazing-fast 4G LTE networks聽聽
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well they provide typical speeds from between 1/4聽
to 1/2 of the FCC's definition for broadband in聽聽
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most cases anyway does that mean that 4G is not聽
broadband well cellular networks are constantly聽聽
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being improved to so their speeds will only get聽
better with time as well but after looking at all聽聽
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of these numbers I think it's easier to say what聽
we said in the beginning that broadband means fast聽聽
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and that means faster than what I had yesterday聽
that means that the benchmark is always going聽聽
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to move you will always demand something better聽
because you will always demand something faster聽聽
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than what you had yesterday but hopefully you聽
now have a better understanding of what the term聽聽
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broadband means the technologies behind it and how聽
those different technologies compare in particular聽聽
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how they compare to each other and how they聽
compare to the federal government's definition聽聽
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and remember what you think is broadband聽
today is probably not going to be broadband聽聽
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tomorrow because tomorrow you will still define聽
broadband as faster than what I had yesterday
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