Compatibility and SSID

Video Activity

Compatibility and SSID This lesson covers compatibility between wireless standards and Service Set ID (SSID). Compatibility is determined by the relationship between the network interface card and the computer and the wireless access point that we are connecting too. Service Set Identifier (SSID) identifies wireless names. To make the router secure...

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Time
31 hours 29 minutes
Difficulty
Beginner
CEU/CPE
30
Video Description

Compatibility and SSID This lesson covers compatibility between wireless standards and Service Set ID (SSID). Compatibility is determined by the relationship between the network interface card and the computer and the wireless access point that we are connecting too. Service Set Identifier (SSID) identifies wireless names. To make the router secure, set to no broadcast, so users actually have to do some configuring to get in to the wireless network, which offers more security.

Video Transcription
00:04
when we're talking about a different wireless standards, we also need to understand our compatibility between them. We mentioned it a little bit of we mentioned it a little bit, but we also we talked about how our compatibility is determined by the relationship between our network interface card in our computer and the wireless access point that we're connecting to a network interface card and our wireless access point.
00:23
I have to support combat compatible standards
00:26
or else we're not going to be able to talk between our two devices now are a 22.11. A standard is compatible with our attitude at 11 in standard, as long as our 802.11 in Standard has five gigahertz, five gigahertz enabled
00:43
are a goto 0.11 in wireless access points may have
00:47
the ability to disable the five Giga Hertz frequency. Or it may not have come with five megahertz frequency as insulted an option on this particular wireless router and may just push out at the 2.4 gigahertz frequency band. So we need to make sure that in order to have compatibility between our A and R N standards that were pushing out at five
01:06
gigahertz.
01:07
Now our next compatibility set is going to be the B G. And in standards are
01:14
B G and in
01:15
cards are going in. Our computer are going to be compatible with RBG or in wireless access points because all of these run on our 2.4 gigahertz. But again, if we don't want to disable that 2.4 gigahertz on are in or else it won't be compatible. Keep in mind, however, our speed is determined by a lowest common denominator.
01:37
If we're pushing through on a 802 11 in router.
01:41
But our card in our computer only supports a tow to 0.11 B, and we're only gonna be pushing through at 11 megabits per second. We're not gonna be able to support that full extensive bility of that 802 11. In standard, we may not be able to support things on our computer, such as the channel bonding or the memo,
01:57
because our computer, our wireless card on Lee, supports that be standard.
02:02
So keep that in mind and recognize that when we're determining what network interface cards are, what wireless access points, we should pick up
02:10
Well, Anthony, you say,
02:14
how do I determine why? While its access my network interface cards capabilities without having a go online or find the manual and everything like that, Well, it's a good question.
02:25
And for that, we do have an answer. Um,
02:29
we're running in a Windows computer one of the ways that we can determine which standards are wireless interface. Our network interface card are wireless network interface cards. Supports is going to be by running the command net S H space, W lan space show space drivers.
02:47
So we're gonna open up a command prompt. We're gonna hold down the windows key and press are or start accessories and our command prompt. And we're gonna run this command net. Shh. Space W lan Space show space drivers. And then we'll get some information
03:04
in one of the information that we are. A bit of the information that we may see will be next to
03:08
radio types supported
03:12
and the next to radio type supported. It will show us if we support the A, B or G, A, B G, or in standards. So using that information for from our network interface card, we can go out in the terminal router.
03:23
Now, if we're in an environment where we've set up a
03:28
wireless access point and we want to set it to a single standard, maybe we just wanted to support in network interface cards, then we want to make sure that all of the network interface cards in our environment support that standard. It's sort of like an additional layer security, almost where we have a wireless access point that
03:46
we set toe only use the end standard. All of the network interface cards in our environment are in standards.
03:53
And then if anyone were to try to come in with a wireless what a laptop that only used a B and G, then they wouldn't be able to connect to our device.
04:02
So understand that we do have the ability to limit our wireless access point to just transmit to a particular standard such a czar in standard.
04:12
Lastly, we have s i d Now s I d is one of our more simple concepts with our wireless access points and s I d is simply gonna be that name that you see when you click on what wireless networks are available and it shows the s s I d and s I d stands for service set, Identify air.
04:29
And it's the name that we're giving our wireless router
04:31
so that we can connect to it and we can connect to our network.
04:35
Now, we can have multiple wireless routers with the same S s I D. But we need to understand Stay in that win, Lee to do some additional configuration and we'll need to set those up accordingly so that we can so that our device will be able to go between those different Why those different
04:50
wireless access points with the same s i d.
04:53
Now
04:55
our service that identifies going to identify a wireless name. And we will need the s s idea of a router in order to connect to it.
05:01
If we have a wireless router encrypted, which we very much recommend that you do, then you'd want to then use your computer needs to know that s I d as well as the encryption key for the router that you're connecting to
05:15
now.
05:16
Typically, a lot of people will leave their s s i d set to broadcast, which means that if you open up your computer you turn it on and you click on what wireless networks are available. You'll see it there, and then you just click it and throw the key in. You're in
05:30
to secure our environment. What? Well, what we may want to do is actually set our wild will turn off our broadcast on our router. So we will
05:43
set to know broadcast. Now, what that does is when someone typical user opens up their laptop clicks on what wireless networks are available, they won't see our wireless network.
05:56
They'll have to actually go into advanced configurations and click add a wireless network and then type in the S S I D. And then enter the key. This provides us with a little bit of additional security. It's not foolproof. It's very easy to open up on install wireless while it's protocol analyzers
06:13
to check and see and just sort of sniff the air and say, Oh, wait, here's a packet with this aside, a society
06:18
and capture those and then use those to determine the S s I. D s of the wireless networks we have out there. But it is, and a little bit of layer of security in order to prevent Peeping Toms from just saying Oh, look, this is easily accessible. Let me see if I could poke around here If I can try and *** crack on this this encryption key
06:38
So we would want to if at all possible,
06:41
turn off. That s I d broadcast. If we have a network where we can manage and make sure that people are connected and that they know the S S I d
06:48
rs s, i B, we also want to change from the default, especially if we're in an environment where we have to change or we have to leave the s s I d. On on broadcast. Maybe it's a guest network where we allow people to connect into this router in order to access the Internet in our coffee shop.
07:05
And we can't just turn off as society broadcast. We leave it on
07:10
Well, we'll want to change that name from the default because if you have a wireless network that the wireless S s I D name is links this to 475 then
07:19
all it takes is a very quick Google search to determine what the make and model of that router is to determine what vulnerabilities lie with that making model router to determine what the default Web page log in for that router is And to enumerate all sorts of information about that just from that S s I d
07:36
that could be used to attack your wireless router and attack your network.
07:40
So we want to change, That s i d from it's the default. So it isn't what it came from out of the box. We may want to change the default Web page and administrative law gin. We very much want to do that, especially if it's an out of the box router changed by default Web page log in. And we'll also want to look at changing our default
08:01
key that's associated with our encryption. But we'll talk more about these particular steps in our security module.
08:07
So thank you for joining us here today on cyber dot i t. Today. We talked about set up in configurations for wireless access points, things like where we should place our wireless access points to the different antenna types that we have. And we talked very heavily about our different frequencies and our channels and some of the different ways that we can configure a wireless access points
08:26
to make sure that people are compatible with those channels.
08:30
So hopefully this information will be useful in when you're setting up your own wireless network or when you're configuring your own wireless access points to make sure that they run effectively and smoothly in your network. So we hope to see you here next time on cyber Dad, I t.
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