Time
31 hours 29 minutes
Difficulty
Beginner
CEU/CPE
40

Video Description

Cable Connections This lesson covers one of the most core components of networking which is the connection between our in points. Data needs to be sent via a physical medium. These can include cable mediums such as:

  • Fiber optic cables: relies on light signals, no electromagnetic interference (EMI)
  • Co axial cables
  • RJ45/CAT cables

Video Transcription

00:04
Hi and welcome to Cyber Die T. My name's Anthony and I'm your local subject matter expert for Network Plus. And today we're going to be combining two of our network plus modules, modules 3.1 and 3.2. And we're going to be talking about our different cable and media types as well as our different connector types and their properties.
00:23
So when we're setting up our network so we're evaluating how networks work, one of the different one of the most core components one of our core components is going to be our physical connections between our in points. Now, data needs some physical medium that it can send over. They they can't just go from point A to point B
00:43
through the power of
00:45
Elektronik telepathy. We need some sort of physical medium to carry the signals. Now, when we're the physical mediums that we're gonna be talking about in this segment are going to be cable mediums such as our fiber optic cables are co axel cables are R J 45 or enact art. Rather our cat cables.
01:03
They're going to be our physical mediums.
01:06
Now you may think, Well, what about wireless transmission. That's not a physical medium. Well, surprisingly, when you think about it, when you think about it at face value, you may think, well, wireless is in a physical medium because there's nothing there I can really touch well behind it all, it is relying on a physical medium.
01:25
Wireless is transmitted over radio waves with her actually electrical waves,
01:30
and those electrical waves are physical waves. They're just in the form that we can't really touch or feel them Sometimes. If on electrical wave is at a certain point, we actually could feel it. If we if there were actually microwaves that were pointed at us, we would feel the heat from them.
01:48
So different electrical waves that we use in our wireless connections
01:53
are also considered physical connections, because even though they're transmitting through the air and we can't see them, they're still a physical connective ity going on with those radio waves. But in this module, we're gonna be talking about our cable connections now one of our cable connections, and it's and it's one of our more
02:10
more recent cable connections that we've developed
02:14
our fiber fiber connections.
02:16
Now, fiber connections are unique and fiber cables are unique because fiber does not rely on electrical impulses, does not rely on metal cabling. Fiber relies on glass or plastic rods, and it relies on light signals. Now
02:32
light travels a lot faster than electrical impulses. Does electrical impulses D'oh so we can rely on fiber optic cables on our backbone networks now are back when we talk about backbone networks. We talk about major connections through a large enterprise environment
02:52
that we have a lot of data that's traveling on.
02:53
Or we're talking about cabling this coming down from our Internet service provider to a box on our street or cabling that connects multiple Internet service provider substations together. So this these backbone cables are we're are sort of our information superhighways,
03:10
rather than our smaller back roads. Or ours are residential streets.
03:15
There are There are beltways, and there are highways of information. So the fiber optic cables help us to pass that data at a faster rate than standard metal cables would. Because fiber optic cables use light signals, they use a light impulses.
03:31
Now, these fiber cables are typically made of glass or plastic. Have glass or plastic inner core
03:38
with an outer plastic cladding, and that plastic cladding keeps the light signal inside of the corps.
03:46
Now one of the benefits of fiber optic cables is that we aren't going to be susceptible to. Am I? Now we've talked about. Am I a little bit e. M. I stands for electromagnetic interference, and it's what happens when other interference when other electrical impulses, such as other electrical waves or light sources or electrical devices,
04:05
provide some provide interference cause interference on our cables.
04:11
Now this is only a practice. This is only a concern with metal cabling. This is only concerned with WiFi that works over radio waves with our plastic or glass metal or plastic or glass rods in fiber optics.
04:26
We're transmitting with the right light signal, so we're not worried about electromagnetic interference. That's not something that we're really we're not concerned about.
04:33
So we were able to travel farther because our light signal isn't going to have any interference from anything.
04:40
Now, with our fiber optic cables, we have said we have two different main types of fiber optic cables that we're going to be encountering. We have single mode fiber S, M F, and we have multiple multi mode fiber mmf.
04:54
Now the main difference between single mode fiber and multi mode fiber is going to be how it transmits its light signal across the cabling are single mode fiber is going to be a are single core, and it's going to carry a single beam longer distances,
05:12
and it's gonna have a typically a laser die owed that is going to transmit across that core.
05:17
So when we think of when we hear laser die, odes in a fiber optic cable were typically going to be talking about single mode fiber. Now, single mode fiber, we say, can carry longer distances, and we're talking longer distance. We're calm. We're talking about distances up to 50 miles on a single cable strand. That's a long distance,
05:38
and we can see how
05:40
you know just how much
05:42
fiber optic cables can give us the benefit of having a backbone infrastructure. Well, how can that How can that signal go 50 miles? Well, these light signals these light impulses don't really.
05:57
They don't attenuate and they don't have interference, like our electrical impulses do. We don't have to have is many repeaters. In between are different segments of fiber optic cables. Think of sunlight that's coming from us from the sun. Now the sun is a much, much more powerful light source than a laser diode would be on our single mode fiber.
06:15
But that light source from the sun is
06:17
traveling a long way to get to our eyes, and we can still see it just as when we can still see it just as well. If you if you've ever had a laser pointer and you've ever pointed a laser pointer at anything's if in a very, very dark environment you can shoot a laser pointer
06:35
a very long way, a very long distance.
06:39
So there's no other light Source is interfering with our fiber optic cable, which there aren't because it's inside of a cabling. That light signal that light wavelength is going to be able to travel a very long distance in this case, up to 50 miles.
06:53
Now that's our single mode fiber are multi mode. Fiber is a thicker core, but it takes multiple raise a shorter distance. So it's using multiple rays inside of this thicker core, and so we need to know we're only able to take them a little bit of a shorter, a shorter distance.
07:12
Now this multi mode fiber were typically talking about
07:15
500 meters and in comparison with our single mode fibre rather than a laser core, we're usually talking about using an led core in order to send those signals.

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Anthony Harris
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