Time
31 hours 29 minutes
Difficulty
Beginner
CEU/CPE
30

Video Description

Quality of Service and Traffic Shaping This lesson discusses methods for optimizing a network. One of these methods is Quality of Service (QoS). This helps ensure priority of latency sensitive packets and can be built into network devices. Another method is traffic shaping. Traffic shaping can delay less important traffic and makes the most of available bandwidth and might be on the user end or on the Internet Service Provider (ISP) side.

Video Transcription

00:04
So one of our first concepts, one of our first methods for optimizing our network is going to be quality of service, also known as KYOOS. Now quality of service is what allows us to prioritize certain packets that are more Leighton see sensitive over packets that are less so.
00:21
So say we're making a video conference call over our network. At the same time, someone else's potentially downloading a file from a server hosted online.
00:30
Well, our packets for our brisk our voice over I p o r video call are going to be a lot more Leighton See sensitive than those download packets? Yes, maybe that other person is trying to download those as quick. It's the packets as quick as possible bet.
00:45
Just because their packets may be delayed, a couple extra 100th of a second
00:50
doesn't mean that they're downloads not going to get to them. It's so going to get to them, and it's not going to get to them an hour or two later than it normally would have. It may just be delayed by a minute or two, but it's going to give more priority to our video call packets
01:06
than their packets because this quality of service knows that our video call packets.
01:11
If they're delayed even by a couple 100th of a second, it will be a noticeable results on our end. That okay, that looks a little bit choppy. Or that looks a little bit delayed like I'm trying to talk to this person and then they don't seem to hear me for three or four seconds. That's that late and see sensitivity that we talked about. That's those packets with that video streaming or
01:30
music streaming or the video conference call or the verse of I P Call
01:34
that are sensitive to delays in the receipt of the packets that are being sent. So quality of service will help to ensure priority of Leighton. See sensitive packets.
01:48
Now we can get devices for our network are different routers and switches that are quality of service. Kyoos que os available they're able to are they had the cure s functionality. They are able to perform this quality of service and were able to set it up and say OK, yes, I want you to profound quality of service.
02:07
I want you to give these type of packets priority so that we make sure that these late and see sensitive packets
02:14
get to the end user first, and they are prioritized over other types of packets so they can be built into these network devices. So if we have on the network and we're noticing that we're having issues with Leighton, see sensitive applications we may want to consider
02:30
looking at network devices which support que OS would support this quality of service
02:36
now.
02:37
Another component which is similar to cure us, is something called traffic shaping Now. Traffic shaping, in a nutshell, is making the most of an available bandwith by taking certain, taking certain packets, taking certain data streams and throttling the speed down
02:55
of which they're being transmitted.
02:58
For example, let's say we have a lot of people on our network. They're doing a lot of heavy downloads, and it's starting to startinto effect on other networks. Functionalities is starting to affect people making these video calls or just being able to access their email. Well, then we may want to perform traffic shaping
03:15
and actually identify what type of data streams. What type of packets
03:21
are being used for this file Downloading being used for this file streaming and then we can delay. And we can live essentially later the importance of these packets and tell our device which is performing this traffic shape in shaping. Okay, When you send out this packet or when you're receiving this packet, I want you to root.
03:40
I know, but you could immediately go and get another one.
03:44
But I want you to intentionally rate ah, couple 107 seconds before you. D'oh!
03:49
So were intentionally throttling into 10 intentionally reducing the speed of these packets to make more use of our available bandwidth for our other data streams. So that's what our traffic shaping does. We're making the most of available bandwidth by delaying less traffic that we deem less important.
04:09
Now this could be done on our user end. This could be done by us on our devices,
04:13
but it's also not unprecedented for it to be done on the Internet service provider side.
04:18
This traffic shaping can be done on their side for things such as very heavy usage, file streaming or very heavy usage websites.
04:29
Your Internet service provider if they believe that you're doing things such as
04:33
illegally tormenting or if they believe that you're doing things that are very heavy on their bandwidth usage. They may perform traffic shaping on you and do what's called throttling your Internet connection. So you may notice. A. You may see a noticeable drop in the amount of speed that you're able to
04:53
perform network perform network functions on on your Internet connection.
04:58
And you may say, Well, what's going on? It was fine last week, and now I have been sudden drop. While it may be because of this network throttling through this trap, it traffic shaping from your Internet service provider. Now traffic shaping has a lot to do with a very hot topic
05:16
right now in the United States at least
05:19
called net net neutrality. So what has met? Neutrality?
05:24
Well, the idea behind net neutrality is that we're making all of the content. We're making all of the data streams from the Internet to end users neutral. It doesn't matter what the content is. It doesn't matter what the data packet is. It all has equal importance. So it all has equal space on our bandwidth,
05:44
from the Internet to us,
05:46
and the Internet service provider should not be allowed to adjust the speeds for certain traffic just because this is a video stream or this is a file stream, and this is another type of content that we want to be faster
06:00
now at those value, this may seem not too bad, but when you really start looking at the implications of this, it could be very big. This can allow Internet service providers to do things such as speed up the traffic for your particular connection to a site that they get paid by
06:19
to allow you to have a fast connection to,
06:23
say, the two competing companies and company A
06:28
pays the your Internet service provider to allow you to get to their website faster than the competing company.
06:34
So in users in customers, when they try to get to company A versus company, be noticed that the Internet connections a lot faster. So they're better with company A just off of the fact that they're able to get to the website faster. And it's not because Company B is doing anything wrong on their Internet back in there, not doing anything wrong on their technical side,
06:55
it's because the Internet service provider is actually performing traffic traffic shaping,
07:00
and they're actually throttling the speeds of connections to this company. Be so it's a very it's a very has a lot of implications. Taking away net neutrality and saying that Internet service providers can shape content that can shape band with traffic to certain websites
07:18
they can.
07:19
You can have an Internet service provider that says, If you want to use Netflix and if you want your speed to Netflix to be Justus fast as your speed to YouTube, you're gonna have to pay us
07:30
10 extra dollars a month in order for your speed to Netflix to be just as fast as your speed to YouTube. So So it's important. Thio Looking to Net Neutrality It's important to understand how traffic shaping relates to net neutrality and how it allows Internet service providers
07:47
control over the speed of access from us, too,
07:51
where we want to go on the Internet.
07:55
So just about a sidebar that's related to traffic shaping here

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CompTIA Network+

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Instructed By

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Anthony Harris
Systems Analyst and Administrator at SAIC
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