23
votes
Do Wi-Fi and IEEE 802.11 mean the same thing?
IEEE 802.11 is a standard that describes procedures, limits, values, algorithms to enstablish a WLAN connection.
Wi-Fi is a brand name owned by the Wi-Fi Alliance that certifies with pre-defined ...
- 331
19
votes
Accepted
Four layer-2 addresses in 802.11 frame header
The distinction to understand is that while an 802.11 device is transmitting to a receiving device, either one (or both) of these devices may not be the actual source or destination of the L2 traffic. ...
- 27.2k
18
votes
Accepted
Do Wi-Fi and IEEE 802.11 mean the same thing?
Wi-Fi is IEEE 802.11, the same way that ethernet is IEEE 802.3, token ring is IEEE 802.5, FDDI is IEEE 802.8, etc.
These are some of the IEEE LAN protocols, and the IEEE working groups associated ...
- 98.8k
15
votes
Do Wi-Fi and IEEE 802.11 mean the same thing?
In Short,Wi-Fi is more of a technology name and 802.11 is the IEEE standard. There are different variants of 802.11 based on your bandwidth ,Modulation schemes etc.
I would always use the specific ...
- 1,412
14
votes
Can I truly multicast over WIFI?
As I understand Wifi, it can never true multicast, as each device
holds a '1:1" relationship with the AP, and then receives the same
packet... then the next device connects and gets the same ...
- 27.2k
12
votes
Accepted
Can I truly multicast over WIFI?
Lets test this out then. If we send multicast packets to multiple devices connected to a WiFi access point at a constant rate, then the access point should report the same amount of traffic.
To run ...
- 144
12
votes
Accepted
WiFi versus Wireless LANs
Wi-Fi refers to a specific wireless LAN type (IEEE 802.11), but there are other types of wireless LAN.
All thumbs are fingers, but not all fingers are thumbs. All Wi-Fi LANs are wireless LANs, but not ...
- 98.8k
11
votes
Accepted
How is the Groupwise Transient Key used in WiFi networks?
Why then does the client need to encrypt the broadcast using the GTK?
It doesn't. Since the AP broadcasts, not the client, the client doesn't use the GTK to encrypt the frame. The AP does.
Why can'...
- 27.2k
10
votes
Accepted
How to find the client who downloads a big file?
The easy way to do it could be:
On your WLC home page you should have something like:
You can reset the stat through the gear icon on the top right corner, selecting "Clear Dashboard Data"
Then ...
- 19.5k
9
votes
Accepted
Raw-Ethernet Frames
First, Wi-Fi (IEEE 802.11) is not ethernet (IEEE 802.3) any more than token ring (IEEE 802.5) or any of the other IEEE LAN standards other than 802.3 are ethernet. The frame headers are different for ...
- 98.8k
9
votes
What does "802.11" in "IEEE 802.11" mean?
802 is the number for the IEEE LAN/MAN Standards Committee, and 802.11 is the Wireless LAN Working Group.
The IEEE 802 committee maintains a web site, which lists the various current working groups ...
- 98.8k
9
votes
Do Wi-Fi and IEEE 802.11 mean the same thing?
802.11 are the IEEE specifications that implement wireless local area networks. In common parlance I think 802.11 is more or less synonomous with Wi-Fi. Note that Wi-Fi is actually a trademarked ...
- 2,102
9
votes
Accepted
Stretching VLANS across a network infrastructure
That is actually overly broad. There is nothing technically wrong with VLANs being used over a large network area as long as the network is designed properly. In modern networks, you can use more ...
- 2,070
8
votes
using fiberoptic for long-distance ethernet connection
Part 1: Using fiber to run a 1000 foot ethernet link
Using fiber to run a long ethernet link is not quite as simple as you make out but it's certainly not unreasonable to DIY.
A few things you have ...
- 13.2k
8
votes
Accepted
Are "ad-hoc" networks always wireless?
Caveat: This question might raise primarily opinion-based answers, and might be put on hold or considered off-topic, for exactly that reason.
Still, I dare to attempt an answer:
Following https://...
- 8,826
8
votes
Accepted
Why do we have authentication before association in 802.11
Why does client authenticate before associating with the AP
This does seem a bit odd. Yes, in modern 802.11 there is an open authentication that takes place before the association request/response. ...
- 27.2k
8
votes
Why is microwave faster than infrared as a transmission medium?
Faster in terms of propagation delay? @Zac67 answer is good.
Faster in terms of data throughput? Here, infrared has a huge theoretical advantage.
The whole microwave range consists of about 300GHz ...
- 269
7
votes
Raw-Ethernet Frames
Based on your questions and comments, I think you are missing the point of the two articles you are referencing.
When they are talking about "Raw Ethernet," they are talking about data frames that do ...
- 27.2k
7
votes
Accepted
Why would a WiFi extender use the same channel as the primary AP?
Simple, it only has one radio. One radio === one channel. If it has two (or more) radios, then it can use one for the mesh, and the others for clients.
If your WLAN employs security, then every ...
- 31.8k
7
votes
Accepted
How to put special characters on ssid
Looks like an Emoji, hex code 1F193:
🆓
If the interface of your router allows it, you can simply copy and paste the above character on the SSID text field.
Note: the style of the character will ...
- 1,299
7
votes
How are different phone/GSM operators connected with each other?
As simply as possible, telephone calls are routed across a network of switches which are interconnected using trunks. There are interconnect points for different operators/carriers' switches. Since ...
- 206
7
votes
Accepted
Alternatives to 802.11* wireless bridge?
are there any reasonable alternatives to 802.11 protocol being used
nowadays for such links?
Yes. The first that comes to mind is optical bridges (See FSO). They require line of sight, obviously. ...
- 67.1k
7
votes
Why is microwave faster than infrared as a transmission medium?
I've read that microwave is a faster medium of transmission of data than infrared.
It's not. Light moves at the speed of light (c0), (pretty much) regardless of its wavelength - in reference to the ...
- 82.7k
7
votes
Why is microwave faster than infrared as a transmission medium?
Given the context which is severely outdated when not completely false, "infrared" seems to mostly refer to short-range low-bandwidth infrared communications as used:
In many TV remote ...
- 733
6
votes
Accepted
How fast data travel wirelessly than in metal?
Electrical signals basically move at the speed of light in that particular medium. In (copper) wires that is usually around 70% - 90% of the speed of ligth (in a vacuum) or around 200,000km/s - 250,...
- 201
6
votes
Accepted
Is it possible to amplify a 5GHz wifi signal?
But I could literally not find a single 5GHz amplifier. Why is that? Am I just too stupid to find them or is it simply not possible to amplify 5Ghz in the same fashion for some reason? If so, why?
On ...
- 27.2k
6
votes
Accepted
Isn't 5Ghz band affected with channel overlapping?
For 2.5GHz band, 1,6 and 11 are the recommended channels and are safe
to use. Isn't this applied to 5GHz also?
No. In the 2.5 GHz band, the channel spacing is 5 MHz. That's why you can only use 1,...
- 67.1k
6
votes
Isn't 5Ghz band affected with channel overlapping?
As Ron already noted, the channel spacing is wider, and furthermore, there are many more 5-GHz band channels available in most countries (particularly for a DFS certified device.) Look here and scroll ...
- 2,746
6
votes
Accepted
In 802.11 Wi-Fi, Is it better to be on the same channel as other networks instead of being in an overlapping channel?
It is better to be in the same channel as your interfering signals (if you can't find a free channel) rather than in overlapping channels that are not the same channel - if you are in a nearby channel,...
- 2,746
6
votes
Can ISP know computer MAC address in local network?
A mac address doesn't make it past the first hop (most likely your home router). It stays local to the broadcast network.
IMEI isn't transmitted over wifi, so your ISP will also not see your IMEI. ...
- 246
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