Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [802.11]

IEEE 802.11 is a set of standards for implementing wireless local area network (WLAN) computer communication in the 2.4, 3.6 and 5 GHz frequency bands.

0
votes
0answers
35 views

802.11s mesh network cannot ping between different Ubuntu systems

I am setting up an 802.11s mesh network on Ubuntu Linux systems, after disabling NetworkManager and netplan.io. The following commands are an example of what is used to set up the mesh on one ...
0
votes
1answer
46 views

How to make Wireshark show http format instead of 802.11 or check if Wireshark is capturing it

First of all, this might look like a duplicate from this post, and it kind of is, but at the time writing my rep is not high enough to comment and I was walking in to some issues whilst applying that ...
0
votes
2answers
89 views

Windows 10 cannot use 5Ghz to reach 100mbps

I have upgraded my landline to get 100mbps. My router can handle it since I manage to peak at 96 with my cell phone, a OnePlus One 5T For my PC, I bought an ASUS PCE-AC56 to be able to reach those ...
0
votes
1answer
23 views

Deauth frames showing up as ethernet II frames under wirshark

I'm trying to write a simple deauth attack script, but when I when fire up wireshark instead of deauth frames I only see Ethernet II frames; in addition the frames have no effect on any of my network'...
0
votes
0answers
204 views

Activate Fine Time Measurment from 802.11mc on Intel 8260/8265 under Windows 10

i am trying to use the FTM protocol of the 802.11mc. I have two Linux systems with an Intel Wireless 8260 and i get an answer when making a ftm_request. However i have also a Windows System with Intel ...
0
votes
1answer
46 views

Capturing Link layer frames

I've been trying to capture link layer frames. I've tried using wireshark (also tcpdump and airmon-ng) both in monitor mode and managed mode (/promiscuous mode), yet have been unable to see them. Put ...
0
votes
0answers
540 views

5G Networks Disappeared from Network List

All 5GHz networks have suddenly and inexplicably disappeared from the network list on my Windows 10 PC. Normal 2.4GHz band networks are still there. Have been connected in the past, always (stuff ...
0
votes
1answer
24 views

connecting from tpye A device to b/g/n wirless network

i have an old ubiquiti nanostaion5-Loc which seems to only support 802.11A and a tp-link w8960n router supporting b/g/n im sure the nanostation can be used as a wireless bridge but can i use it to ...
1
vote
0answers
88 views

WMM/WME(802.11e) not working properly in 802.11n?

I'm performing some tests regarding 802.11e (WMM/WME) performance and when doing up-link it isn't working properly. Im using an Lynksys 1200ac with OpenWrt/LEDE as AP, and two PCs lets say PC1 and ...
0
votes
1answer
175 views

Which 802.11 frame should be used to identify clients of an Access Point [scapy]

Which 802.11 frame should I use in order to identify if a specific MAC address is associated with an Access Point. Beacon frames as named could be used to identify the Access Points, but how to ...
1
vote
1answer
137 views

How MU-MIMO handles TxBF and transmitting multiple streams together?

I have gone through a lot of references and most of it told like atleast 2 antennas are required to do TxBF, and with two different antennas either we can do TxBF by transmitting same streams or ...
0
votes
0answers
47 views

Troubleshooting poor Wi-Fi performance of one particular device in a home network

I have a problem with one particular device, a nettop. It has a RTL8821AE adapter (1x1 2.4/5 GHz 802.11ac). Pinging the Wi-Fi router from this nettop often looks like this: Pinging 192.168.31.1 with ...
0
votes
1answer
103 views

How often will an unassociated STA scan the network?

Consider an 802.11 STA that is currently unassociated. While unassociated, how often will it scan the network (passively or actively) to determine available APs? There is enough information about the ...
0
votes
1answer
171 views

WIFI protocol mismatch on 5GHz

Hardware involved: FritzBox 5490 and a Lumia 950XL smartphone (with Qualcomm Atheros AR6320) While beeing connected on the 5GHz band the router' webinterface reports using 802.11ac for the connection ...
0
votes
1answer
459 views

How to capture tcp/ip traffic in wireless connection with 802.11x frame format?

I'm using wireshark program to sniff my traffic. When i change mode of my network card from managed mode to monitor mode, i only see "beacon frames" and "RTS & CTS" packets in wireshark. Is there ...
2
votes
1answer
2k views

Why do i see Ethernet II protocol in wireshark in wireless connection?

I have a small network in my home that consists of one network device named airties rt-205 and clients. Clients connect to this device via wireless and send its packet to the internet through this ...
5
votes
3answers
35k views

Is wireless n only faster than mixed mode? [duplicate]

I thought wireless n is backwards compatible with g and b (and wireless g is backwards compatible with b)? If this is so, why do many home routers have settings to specify "wireless n only"? I have ...
0
votes
2answers
2k views

How to decrypt 802.11 packets manually?

Without using Wireshark, how are 802.11 meant to be decrypted? I know the EAPOL and passphrase are required, but what are the steps required to perform the decryption? Another way to put it is, how ...
9
votes
3answers
967 views

What is the current version of the 802.11r standard

I'm looking for WiFi mesh standards (802.11s, 802.11r, 802.11k, 802.11v). For example I have found 802.11r-2008 on IEEE's site (here). The page says that the standard is superceded, but it doesn't ...
1
vote
1answer
312 views

How to get 802.11 protocol type of wireless interface in Debian 8.6?

I have one wireless interface that connected to an access point (AP), and I want to know which type of 802.11 protocol (e.g. 802.11n or 802.11b) is used to communicate with AP. I know there is a Linux ...
2
votes
1answer
235 views

Multiple 802.11 associations with single physical antenna?

My Question is as an access point with a single PHY# hardware antenna is able to create multiple virtual interfaces and and announce multiple SSID Now, as we can create multiple virtual interfaces in ...
4
votes
1answer
87 views

What change enabled the range doubling from wifi protocols 802.11g to 802.11n?

I've been recently struggling with bad wifi reception through concrete walls and couldn't help but notice that both the integrated wifi in my laptop (a/g/n) and my phone (a/b/g/n/ac) have far better ...
2
votes
1answer
292 views

Is it better to choose a more-crowded WiFi channel or one with a strong competitor?

In this other SuperUser question, the consensus was to stick with WiFi channels 1, 6, or 11. But what if two of those channels (channels 1 and 6, for example) are both very crowded, but the other ...
2
votes
1answer
494 views

What is the purpose of both 802.11 re-authentication and re-association while roaming?

I mean this. Firstly I've connected to my iPhone to my D-Link router : And then I've moved to another floor and was reasonably connected to my another ZyXEL router that was closer: Authentication ...
2
votes
0answers
100 views

Should a device that supports WPA2-AES be able to connect to a Mixed Mode network (WPA-TKIP, WPA2-AES)?

I'm not sure if this is the right place to ask this question, please let me know if it is not. I have a specific question about the 802.11 security standards for WiFi. I am using an embedded WiFi ...
1
vote
0answers
593 views

How to configure AAA server and hostapd to support Hotspot 2.0 / Passpoint?

I am trying to setup an independent Hotspot 2.0 network. I am using TP-Link Archer C7 v2 routers as accesspoint. I built and flashed Openwrt 15.05 on router. Built hostapd from source with HS20 and ...
0
votes
2answers
74 views

How do older non-MIMO standards like IEEE 802.11a, 802.11b, 802.11g make use of multiple antennas?

Let's say we have a wifi router which supports IEEE 802.11n, 802.11ac with 2x2 or 3x3 MIMO, and is also backward compatible with 802.11a, 802.11b, 802.11g. Given that 802.11a/b/g are non-MIMO ...
2
votes
2answers
70 views

How to know which 802.11 standard is used by a router

Is there a command that can help me get the 802.11 standard used by a router. PS : My OS is Linux (Ubuntu).
1
vote
1answer
999 views

Can I make a WiFi ESS with a consumer-grade access point?

My house has dead spots on WiFi no matter where I set up the access point that my ISP gave me. I turned off the WiFi functionality on the ISP's equipment, and set up a standalone 802.11ac router ...
2
votes
1answer
3k views

Can I change the Wi-Fi adapter on my Dell Inspiron 15 3542 to get a 5GHz Wi-Fi connection?

I own an Dell Inspiron 15 3542 laptop, which does not support the 5GHz Wi-Fi bandwidth. I want to know if I can change the wireless adapter to a WLAN 802.11AC so that my laptop can connect to a 5GHz ...
1
vote
1answer
9k views

How do I force 2.4GHz Wi-Fi on Mac OS X 10.10 (Yosemite)

I would like to force 2.4GHz Wi-Fi on my MacBook Air because where I am currently everyone is on 5GHz and it has been clogged up so it’s really slow.
0
votes
1answer
182 views

How to calculate “interference weight” between 20MHz, 40MHz and 11ac 80MHz APs?

I want to know how to calculate the "interference weight" in the combination of APs running on different channel frequencies. Lets say I have 10 APs in different operating modes, such as 11a, 11a/n ...
1
vote
1answer
782 views

Will setting an access point to 802.11n mode only restrict the ability of 802.11g devices to connect?

I have an access point that allows for 802.11n and 802.11b/g/n modes. If the AP is set to 802.11n mode in the 2.4Ghz spectrum, are 802.11g clients able to connect?
0
votes
2answers
2k views

Command for removing monitor/promisc from an adapter on OSX Yosemite

How do I accomplish this? I see posts on how to turn it on with the Apple802.11.framework but nothing on turning it off. I ran wash and now I’m currently stuck on monitor mode. Please help! sudo ...
0
votes
1answer
257 views

How to find 802.11 protocol variant, and decipher packet_payload_info in PcapNG files?

I'm building a (Python) parser of PcapNG files created by Wireshark. After reading https://www.winpcap.org/ntar/draft/PCAP-DumpFileFormat.html, I'm having the following problems: I'd like to ...
0
votes
2answers
167 views

How Bandwidth allocation works in 802.11 Network using DCF for e.g

I'm studying how 802.11 dcf mode with CSMA/CA works but I got to a confusing point... since DCF only one user can transmit successfully to an AP (receiver) (considering ideal case when exposed ...
0
votes
1answer
642 views

TP Link AC router slower than Belkin G router?

I recently upgraded my router to TP Link Archer 750 as I needed a USB port in the router to setup a media sharing server. To my surprise this router is performing pathetically. I am running on the ...
2
votes
1answer
628 views

Do 802.11b devices slow down other, newer networks on or near the same channel?

I believe it is well-known and accepted that 802.11b devices connected to networks using newer protocols will slow down the newer devices on that network. The workaround, of course, is to disable 802....
0
votes
1answer
2k views

Problems with mixed 802.11b/g/n

So my home network is currently set up to be 802.11b/g/n (2.4Ghz, 20Mhz), but I have some issues with it. Pretty much all devices work without any problem, except my phone. The Wi-Fi connection on my ...
1
vote
3answers
2k views

Dell e6530 wireless keeps disconnecting on Windows 8.1

I have a Dell e6530 64 Bit with Windows 8.1 and about every 20 Minutes my wireless disconnects even though I am in the same room as the router. I have full signal strength and my colleage does not ...
-1
votes
3answers
73 views

How to figure out what network card I have?

I am starting a new school in a few weeks and their requirements are having your own PC that supports "5GHz (802.11a)" How can I check if my PC supports that?
1
vote
1answer
2k views

What is the relation between number of WiFi antenna and number of spatial streams?

As far as I know, 802.11n WiFi uses MIMO to increase throughput. It uses multiple Tx and Rx antenna (at both the AP and the client side) to send multiple spatial streams at the same time. The number ...
16
votes
4answers
3k views

Can long range Wi-Fi work if one end of the connection is not using a high-gain antenna?

I am trying to understand how long range Wi-Fi works. As far as I know, Wi-Fi consists of Tx and Rx. When a laptop is connected to an access point (AP), the laptop is able to receive data from the AP (...
0
votes
1answer
840 views

How much exposure to Wi-Fi radiation is safe for my health? [duplicate]

I would like to be able to determine whether how much exposure to Wi-Fi radiation is safe for my health. I can see GSM phones are considered "probably safe", until confirmed otherwise, but that's ...
0
votes
3answers
50 views

Can I reduce AP's network and system load with using 802.11b on 802.11g AP?

One of my customer uses 3 Linksys WAP200 AP. Recently, customer reports that they got low wireless speed(about 500kB/s) and low wireless connection reliability. (That means, wireless links keep ...
0
votes
1answer
558 views

Where did the numbers “802.11” in the wireless network standards come from?

I understand what the 802.11 specifications are, but what is the significance of those numbers?
0
votes
2answers
1k views

Why does an access point have a BSSID?

A wireless access point is a Layer-2-device (like a bridge or a switch) right? Pure Layer-2 switches (without any management capabilitis, etc.) don't have MAC-addresses. They just forward Frames (...
1
vote
2answers
834 views

How many bytes of a WLAN packet do I have to examine to extract MAC addresses?

How many bytes of a 802.11 (WLAN) packet do I have to examine to be able to extract source, destination, receiver and transmitter adress from the header? This image suggests the header length of a ...
4
votes
1answer
1k views

Is there a limit to how many separate wifi networks can successfully and securely operate within a given (building) area without interference issues?

I work for a multifamily housing developer. We build apartments. In this case, we are building a facility with about 600 beds (~220 separate housing units). The density is that of a typical apartment ...
0
votes
1answer
777 views

Why doesn't Wireshark capture management frames in promiscuous mode?

I am working with Wireshark in promiscuous mode, which is normally used to allow Wireshark to capture all the frames in the connected network. The problem is that Wireshark in this mode doesn't ...