Time
60 hours 39 minutes
Difficulty
Beginner
CEU/CPE
61

Video Description

WAP Placement and Antenna Types This lesson covers setting up and configuring Wireless Access Point placements. It is necessary to be in the right place so it can send a signal to all devices. A WAP needs to be high and out in the open so it can easily send out a signal. When there are multiple WAPs, it is important their channels do not overlap, as that can interfere with the frequency of the radio signals they send out. This lesson also discusses antenna types:

  • Omnidirectional: equal in all directions
  • Unidirectional: focused power, useful for bisecting at another access point

When setting up a WAP and determining which antenna type to use, we may want to turn the power of the antenna down so there is less power which might help to prevent overlaps and unwanted users using a company wireless connection.

Video Transcription

00:04
Hi and welcome to cyber dot i t.
00:06
My name's Anthony and I'm your local subject matter expert here for Network Plus. And today we're gonna be installing in configuring a wireless network. So when we're setting up our wireless access points, one of the biggest considerations taken to effect is wireless access point placement. You hear when people are talking about real estate, they say location, location, location.
00:24
Well, the same thing with our wireless access point.
00:27
We need our wireless access point to be in a location where it is able to send a signal to all our devices appropriately, that they need. Thio we a wireless access point is One is one of the few networking devices that we don't want to put inside of a closet or locked away or behind a wall.
00:46
We want a wireless access point to be out high in the open so that it can easily send out a signal having to go through walls or having to go travel up or hitting other cabinet served different objects will slow down. That signal will keep that signal from getting farther.
01:04
We'll interrupt that signal and will cause issues with connecting toe our wireless point
01:10
placement is especially important when we're using multiple wireless access points. If we have multiple wireless access points, providing connectivity that all looks the same than our wireless access points will want them to be overlapped so that they provide seamless connective ity
01:27
across our entire office. We don't want someone moving from one location to another location,
01:33
say, with a with a phone that connects wirelessly, and then they reach a certain point in the office. That's a dead zone because there's no coverage there on our wireless network. We're not talking about cellular networks here. We mean the wireless network. So there are WiFi our Internet connection through our wireless card. When we're setting up our wireless access points, we want to verify that they each have about
01:53
a 10% overlap with each of their ranges.
01:56
So if we set up three wireless access points, want a little bit of overlap
02:00
between the three
02:02
uh,
02:04
no more than about 10%. So we don't have major overlaps, but we don't wanna have gaps in between the three of them, which we actually have a little tiny gap here.
02:14
But we'll say that that's actually a full.
02:16
It's a full circle there.
02:17
So we may want to have about a 10% overlap on our different wireless networks were talking about our wireless access points that I'll have the same S s I d in the same key. So are all wireless access points that we can all connect to.
02:30
Now,
02:31
when we're setting up our wireless access points, we need to understand that we have different channels that they're set up on. Now we'll talk about frequencies and channels in a little bit. But all we really need to know right now is that when we have wireless access points that overlap, we don't want their channel bans toe overlap. These channels are the radio are the
02:52
the frequency ranges of the radio signals that are wireless access points use in order to communicate wirelessly.
02:59
If we have channels that overlap each other that are the same channel, then there can be issues with connecting, and there can be limited connectivity or we may have additional interference. So in our three overlapped wireless access points, we want to use channels for our for our 2.4 gigahertz frequency.
03:16
We want to use channels 16 and 11
03:20
because these channels do not interfere with each other and we can overlap them. If we needed to add additional wireless access points, we wouldn't want to make sure that the ones we add we don't add ones that interfere. So, for example, if we needed to add an additional wireless access point over this way, it could be our six.
03:38
We could be on Channel six because that doesn't interfere with our one or 11.
03:44
And then we add another one over this way and it could be our Channel 11
03:49
as long as it doesn't overlap
03:51
11
03:53
and then we can just use that pattern on and on as much as we need to.
03:57
So that's how we set up our different wireless access points. And that's why placement is so important.
04:03
Now we can use action. We can actually use specialized wireless analysis software on our device that has wireless capabilities in order to measure where we should put our wireless access points. When we are told that we need to start setting up wireless access points in an environment,
04:21
one of our very first step would be to determine our network requirements
04:26
What is our network need? What are the different compatibility is with our different devices? What type of wireless cards do they have? What is the environment? Looks like these are all things we need to take into consideration. Then, after we determine our network requirements, Will needs will need to conduct a site survey.
04:40
A site surveys where we actually go to the site, where we're going to be installing the wireless access points.
04:46
And we bring along test test wireless access points that we've set up and we use in order to determine where there may be dead zones where we might need to set up these spots so that there's just a little bit of overlap. We don't have overlapping channels, so we set up those routers. We spring our laptop with our analysis software,
05:05
and this analysis software will receive those radio signals
05:10
and let us know when we're in an area that's stronger or weaker. We can actually use analysis software in conjunction with if we actually have blueprints
05:21
of the location we're working in.
05:25
So let's say we have the blueprints of the office space that we're working in, and then we walk or we move around the office using the latte, we import the blueprints. We import the information and overlay it on top of these blueprints as faras, where the strengths are for the wireless access points and then we'll be able to set up the wireless access points
05:45
and visually see
05:46
are different
05:48
ranges that will have and how far each of our different wireless access points will actually cover.
05:55
So
05:57
we'll use our analysis software will use our setup, are temporarily temporary wireless access points when we conduct our site survey and then use the information that we record from that to determine a better, more efficient way where we may want to set up the wireless access points that we install.
06:15
Or we may even want to look into getting
06:17
more wireless access points in reducing the power, the gain on each of them or getting stronger wireless access points or whatever the case may call for next. We have our intended types now are intended. Types play very strongly into how we set up our wireless access points
06:33
because our antenna types gives up, give us different signal patterns in different gains.
06:39
Now, when we're talking about gain when we're talkin, when we're talking about wireless access. Points were talking about how far our signal can reach. Our gain is the amount of power that we're pushing through to our antenna to push out a signal over our network.
06:55
Now, just because we may have unlimited power source doesn't mean we can get on unlimited gain on our wire on our actual device.
07:02
Wireless networks are our wireless access points distances that they can send. Data isn't just limited by our power. Source isn't just limited by the wireless access point itself, but it also limited by the physical reaches of the actual frequencies that were using
07:21
When were you when we're transmitting. Wireless
07:24
data over wireless access points were using radio frequencies, which are simply just
07:29
way electromagnetic waves that fluctuate in a certain pattern in order to pass along data. And after a certain distance, those electromagnetic waves start to disperse, start to get weak and then have some interference that go along with them
07:46
and then those. Those waves can no longer be interpreted properly in order to receive the data
07:50
so
07:53
but are indifferent. Antenna types will help and are different. Antenna types may help to focus that the power and focus those waves in a particular direction.
08:01
Now we have
08:03
with our signal patterns, we just talked about our gain. Our gain is the distance, and the power that we're applying to our antenna
08:09
are different. Pat types of antenna. We have omni directional, and we have, you know, directional omni directional from the pre freight fix Omni means that it's going to be in all directions. We're going to be sending out out a signal that is equal in every direction.
08:26
Now these types of antennas are especially. You are typically used,
08:31
especially in small home. Are small business or off home requirements where we just set up a wireless access point. And we may only said it one wireless access point, and it sends a signal across our entire environment will typically use the Omni directional antenna.
08:46
The key, with an Omni directional antenna, is that we want to set it up in a central location and want to Senate set it up very high
08:52
because it's in a central location. It'll evenly dispersed out the signal, and and the higher up the wireless access point is, the more it'll be able to spread out the signal over a over our location without having toe hit it into other objects. Now, when we say put it up as high as possible, we don't mean take your wireless access point and put it on your roof.
09:11
We're talking about in your environment. What is the highest location?
09:16
Typically, a ceiling mount will give you a high location where you can put that wireless access point
09:22
next up, we have, you know, directional. Now our unit directional antennas are going to from the prefix. You naming one like Eunice cycle are going to focus their power in a particular direction. Typically, these are done by. You'll see the small. It looks like a bent piece of metal. That act is
09:41
the reflector
09:43
to focus the action, the signal in a single direction rather than dispersing it everywhere. Now these unit directional antennas are useful if we want to just cover ah, particular angle of an office environment. Maybe we have a omnidirectional antenna that covers everywhere
10:01
except for a particular office. That's just not getting any signal. And we may set up a uni directional
10:07
antenna on a separate wireless access point that just hits that hits that corner or just focuses on that stretch of hallway with uni. Directional antennas are also extremely useful for connecting different wireless access points together.
10:24
So if we have to wireless access points to act as a bridge, a wireless bridge between each other
10:30
and they need thio, they need to communicate on Lee between each other. Then we can set up unit directional antennas that are pointing directly at the other one over whatever distance, maybe, and they're sending. They're sending their signal directly toward their the
10:46
perspective antenna on the other side. Now our unit directional antennas are typically going to allow us to push our wireless signal a lot more concentrated. It helps our signals to go a bit farther without losing without losing some of that signal strength or without having his much interference.
11:05
Because our signal that we're pushing is so powerful is so strong that we're getting more throughput on that, that we're not worried as much about that electromagnetic interference. But you know what unit directional? What you need directional antennas aren't good for is a small home or office environment
11:24
where we need to cover the entire office or multiple rooms
11:28
and setting up a unit directional antenna may miss out or may leave some people on the fringes, and they're not getting as good of a signal as someone who may be directly pointed at by the unit Directional antenna.
11:39
So
11:41
by understanding, are different. Antenna types and understanding are Omni directional unit directional. We can focus the signals better. One thing to understand what we're setting up our wireless access point placement and we'll return. We're determining our antenna type, and our antenna gained the power that we're pushing through.
11:58
We may, in some situations, actually want to turn that gain down. We may want to turn the power that are saying that our antenna is getting down
12:05
so that our wireless access point covers less area. Why would we want to do that? Well, maybe we need to cover less area in order to help better coordinate the different wireless access points so they don't overlap too much. Maybe we have a coffee shop where we have a wireless access point that's extremely powerful. That has very good throughput,
12:26
but
12:26
we're getting some signal that's leaking over into the parking lot, and we noticed that We don't really have many people in the coffee shop on their laptops, but we have, Ah, four or five people park in the parking spots right up next to the building that are on their laptop for a now or two. We don't want that. We want people using our wireless to be
12:46
in our building
12:46
or for a business. We only want people. Our employees to be able to try to connect to our wireless prevent people from being outside of our building, trying to crack into our wireless network so we can turn down that signal gain. We can adjust our tent antennas to keep our signal inside our office as much as possible.

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CompTIA Network+

CompTIA Network+ training and certification provides you with the education to begin a career in network administration. This online course teaches the skills needed to create, configure, manage, and troubleshoot wireless and wired networks.

Instructed By

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Anthony Harris
Systems Analyst and Administrator at SAIC
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