31 hours 29 minutes

Video Description

Wireless Technologies This lesson discovers different wireless technologies for Wide Area Networks (WANs). There are a few types of wireless technologies:

  • Satellite
  • WiMax (worldwide interoperability microwave access)
  • Cellular

Video Transcription

So we talked about some of our different cable technologies everything from our cable access to our phone lines and fiber optic cables on dhe. Now we need to talk about some of our wireless access is that we have for our wide area networks
now, our wireless technologies, we're going to include satellite. Why, Max, as well as our cellular technologies
and our satellite technology. It means that we're gonna need to install a satellite dish at our site. Ah, satellite technology communicates between a satellite dish on the ground and a ah satellite in the atmosphere that is going to send the signal back and forth.
And this satellite technology may allow us to have wide streams of,
ah lot of data being pushed at once. But the downside of our satellite is we have it may seem really, really slow because the amount of latent see that's going on. So what's the difference between our weight Leighton see, and bandwidth?
Well, if we think of
the connection between us and the satellite as a road,
we have our satellite and then we have our house.
If we think of the connection between us and the satellite as a road. We have a pretty wide road that we can send data over when we are running over a cable or we're running over a physical, hard line where the amount of data
wide that were able to send its kind of limited.
But when we're communicating between satellite dish and the satellite,
we can send a very wide band with of data we consent. We could make our road very wide in the data that we're sending.
But the problem is
we have a very, very long distance. We have to travel, so we have a wide open highway that we can travel at top notch speeds across to get from point A to point B. We aren't going over a small back road. We have a wide highway that we can get from Point A to point B, but
it's a very, very long distance away. It's cross country. It's from our location to the atmosphere. So
we may notice that if we're trying to access network connections, if we're trying to access the Internet through a satellite connection, that we send a request and we try to send some data and then we wait and wait and wait, and then we get a bunch of data back to us at once.
Now this may be useful. Or this may be acceptable if we are out in the middle of a location where we couldn't get Internet any other way. Eso we send out through a satellite connection and we're just opening up Web pages and reviewing documents. But if we need to have a connective ity that is a streaming connection,
this is really, really bad, because that
are streaming connection needs to be happy, low, latent C, which means we need to be able to get from point A to point B very, very quickly, shouldn't take a long amount of time, but with satellite connections were sending a signal from our satellite dish
to the satellite and then back down to the ground somewhere were then the signals picked up, and it's transmitted over some sort of cable. So if you are thinking about implementing a satellite satellite solution, if you're thinking of putting in a satellite dish to communicate that are to set up your wide area in their network that way,
just keep in mind that you will experience
very, very long, late and seat because of the great distance between the satellite dish and the satellite.
Our next wireless technology is why Max now? Why Max stands for worldwide interoperability microwave access. And this is a standard that allows us to cover a large, typically metropolitan sized area with wireless access. Now this is
covered under the IEEE 802.16 standard,
and it is essentially a again, a broadband access for a large metropolitan area. This is going to use signals that cover up to 31 miles of area with this wireless with these wireless microwaves and up to a 70 megabits per second speed
s Oh, it's a it's a very high speed.
It's broad. It's a broadband Internet access, and it could be up to a 31 mile span of area. But again, typically these air going to be already metropolitan areas, areas that we have densely densely packed groups of people.
Additionally, line of sight can can cause some interference with this.
Other radar systems or other electrical systems could cause some interference with this. So depending on your depending on your area, depending on your area size, the using A Why max this worldwide interrupted operability. Microwave access may be useful because if you do have a clear line of sight,
it is a type of metropolitan type area, and you can install all of these different nodes all over the place.
Then you could cover up to that 31 miles with up to 70 megabits per second. And then, lastly, we have our connection that's becoming increasingly popular. Our cellular access. This is going to be the Internet connection that you use on your phone when you have no other connection when you're not connected to a wireless access point.
But you're still able to navigate through the Internet.
This is gonna be your cellular connection. Now, our cellular Internet eyes divided up into our three major types of speeds. We have our three G h S P A plus, and our four G now are three g is going to give us
on. Now. Our our speeds that we're going to talk about for these three different standards
are going to be the standard speeds that were agreed upon by government telecom agencies. But we'll talk about how companies may not be completely fulfilling these speeds in just a second,
but our three g standard. When you hear three g for cellular, think up to 14.4 megabits per second.
HSP a plus stands for high speed packet access plus and we're going to be looking at up to 168 megabits per second
and then with four g, we're gonna be up to 1000 megabits per second.
Now. We mentioned that with these three different speeds, these are governments, telecom agency assigned speeds. But if you do have a cell phone carrier, if you do have a plan that advertises these different types of speeds and
oh, this is a three G. This is this phone gets up to three G speeds. This is on our four G network.
One important thing to understand is that that it's just because you have a phone that has four G up in the corner. Saying you're getting four G speeds doesn't necessarily mean you are actually getting those speeds.
Even though the telecom agencies have said okay, these are our standards for our different speeds.
Different act different Cellular companies advertise speeds that aren't up to those standards. If they themselves consider it because G just stands for generation if they consider it a next generation device.
for example, if they have when you use three G when they use three G and four g as their terms, when they're describing their cell phone network speed, all they're all they have to do is say
that this device this for G device got better, gets better speed than our three G devices.
They don't have to prove that it meets up to the standards. This is that's 1000 megabits per second or one gigabit per second. You may say, Well, there's no way I'm getting that on my phone. Well, you're probably right. Those That's a very unrealistic for G standard to think that your phone is going to be getting,
especially because there are very, very few locations
that even have the type of cellular technologies in place to support
complete for G phone integration.
The different cell phone companies that have
coin terms, such as for G. Lt saying, Oh, we went from four G two for G. Lt may not even then may not even reach up to these standard speed's for standard for G. So again, just because a certain devices branded as three G or for G.
I don't think that you're going to get up to these specified speeds
all I cut all the cell phone company has to do is say that this device is our third generation device and this device is our fourth generation device and then sell it on the fact that the fourth generation device is going to get better speeds than the three, the third generation device. It's It's a very ambiguous standard.
It would almost be like saying
this phone gets red speeds and this phone gets blue speeds and blue speeds or better than red speeds, and they can coin red speeds and blue speeds as to whatever they want, or this phone is fast Internet. And this phone is fast Internet Plus plus. So, really, the terms are ambiguous. Don't
take those speeds and then
try to go back to your cell phone companies and say, Well, you advertise for G speeds. My phone says getting it for she speeds. But I ran a speed test, and that's not what I'm getting. They didn't they never actually contractually promised you that,
uh so
just keep that in mind, but for test purposes, three g is supposed to be up to 14.4 h p s A plus. It's supposed to be up to 168 and then for G is supposed to be up to 1000 all megabits per second.
just as our recap, our wireless technologies we have we have less than we have our cable technologies. But we still do have a couple of options. Here we have our satellite are which remember is going to be a lot a lot of late and see, because of the distance we have our wine. Why, Max, which is gonna be broadband Metropolitan Wireless
and then we have our cellular, which is going to be our three g h p h s, p, A plus
and our for G standards.
So thank you for joining us here today on cyber dot i t. Today we talked about a lot of our different wide area network connections that we have available to us. We talked about everything from our dedicated least lines and our circuit versus packet switching technologies. We talked about our main different types of transmission media's
our cable connections being our
tell. Our telephone lines are cable TV lines and our fiber lines as well as their different wireless technologies. And we also talked about some different virtual circuits that are different technologies we can use for virtual circuits such a czar, asynchronous transfer mode and our frame relay technologies. So hopefully you
you'll be able to use this knowledge in order to better understand
how are wireless area networks connect. Better understand how you actually get from Point A to point B across the across the city, across the state, across the nation and across the world. So
hopefully you'll be able to take this information digested right, right little side sheets and quick reference guides, and we'll be able to learn this together, and we'll be able to apply it not only to the test but again also to our general knowledge of how networks work. So
thank you again and we hope to see you here next time on cyber dot i d

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