CompTIA Network+ (2009 Objectives) Tutorials
Ethernet Basics / Even Faster Ethernet
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Subtitles of the Movie (CompTIA Network+ (2009 Objectives) / Ethernet Basics / Even Faster Ethernet)
Our network types and our network speeds and functionalities is just like everything else in computers - continues to get faster, shinier, more efficient, and the same thing is true with Ethernet and in this video I want to talk about even faster Ethernet. We started out with regular Ethernet, then we went to fast Ethernet, and then gigabit Ethernet, and now we're talking about 10 gigabit Ethernet. Now let me give you a little bit of a warning here. I'm going to give you the basics of the things that have typically been showing up on the Network+ Exam, but understand this is not enough information for the real world and you need to probably go out there and read a little bit more on this whole gigabit Ethernet stuff, and especially on the fiber aspects because the more you understand about the underlying technology and how it's implemented, the easier it's going to be to answer these questions and to deal with issues in the real world. So, the first up on the fast Ethernet, what you need to be aware of on the exam is that the 10GBase-T, and watch and make sure you pay close attention to that G, there is a 10Base-T that's just basic Ethernet, but 10GBase-T, of course, we're talking about 10 gigabits. This uses Category 6A Twisted Pair cabling, has a maximum distance of 100 meters, again we're Twisted Pair, we're copper, 100 meters is our limit. But it will pass 10,000 megabits or 10 gigabits per second, in English. And so lots of data. Now 10GBSR, and think of the S on these - we're going to do a lot of S, L's, and E's. The S means Short, the L means Long, and the E means Extended. So 10GBSR uses Multi-mode Fiber Optic cabling. It has a distance that ranges from about 26 meters to 82 meters, in other words from about 85 feet to about 269 feet. And again, it will pass this data, it'll transmit it at 10 gigabits per second. Now notice that was SR. LR, Long-range, is Single-mode Fiber Optic cabling and the distances jump from 10K to 25K and that's 6.2 miles to 16 miles. Now again, the fact that we're talking about 10GBase-LR, the LR's meaning it's longer range but we're using different equipment. One of the things that happen with fiber optics is that we put a stronger light, we use different lasers to emit the light and so forth, and so a lot of things going on back there in the technical details. It's fascinating stuff and again, I strongly recommend you go read that, it'll help. And again, our 10GBase-LR is going to give us 10 gigabits per second. Notice ER, 10GBase-ER is like an extended range. This also uses Single-mode Fiber Optic cabling, and notice your distance here up to 40 kilometers, or 25 miles roughly. And you're going to get 10 gigabits per second throughput on that cable. Now we also have a different version of 10 gigabit called SW, LW, and EW and this uses a whole 'nother set of rules or underlying technologies to allow the data to move across the wire. I don't want to go into it deeply here because you won't have to on the exam, but again I would strongly recommend that you go read up on this stuff and it's called WAN PHY, Wide Area Network, and PHY is referring to that Physical layer of the OSI model. Now this utilizes SONET equipment and it uses multiplex signals. If you know what multiplex signals are then you know what I'm talking about, if you don't, don't worry about it, again, won't be on the exam. But this would be an excellent learning opportunity to go out and read, even though it's outside the scope of the course and the exam here. This also, obviously, uses Fiber Optic cabling. Notice again, just think of your S, L, and E as Short, Long, and Extended and that will help you get past the questions and help you memorize these things. SW distances will go up to 300 meters. LW distances up to 10 kilometers. EW distances reach up to 40 kilometers. And so, again, you can see Short, Long, and Extended, 300, 10K, and 40K, alright? All of these, whether it's 10GBase-SW, LW, or EW are going to give you roughly 10 gigabits per second transmission, so that's your 10 gigabit network types. Just know these, know the name, know the distances on these things, know that they're giving you 10 gigabits per second transmission, and you will be able to get past the questions on the Network+ Exam. One more time I'm going to beat this dead horse. I would strongly recommend you go do some outside reading, especially on fiber optics. This has taken over the world as the kind of the standard medium to use especially for long distances and our networks just continue to spread out and get farther and farther and farther and bigger in size and so it looks like we're headed to a fiber world pretty quickly. So just go do some reading on that, OK? But that's your 10 gigabit Ethernet network types.
Tutorial Information
| Course: | CompTIA Network+ (2009 Objectives) |
| Author: | Mark Long |
| SKU: | 34216 |
| ISBN: | 1-936334-90-9 |
| Release Date: | 2011-04-29 |
| Duration: | 6 hrs / 91 lessons |
| Work Files: |
Yes |
| Captions: | No |
| Compatibility: |
Vista/XP/2000, OS X, Linux QuickTime 7, Flash 8 |
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