All Questions
Tagged with 802.11 wireless-networking
74 questions
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How does OFDMA collaborate with CSMA/CA in WiFi 6 and beyond?
The use of CSMA in legacy WiFi conflicts with OFDMA in emerging WiFi protocols. We assume a scenario where all devices (APs and stations) are 802.11ax-based and support OFDMA. We are considering the ...
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1
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69
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CSMA/CA and wi-fi repeaters
I found this interesting article: Why Don't Wi-Fi Repeaters Work Very Well - OK, Why Do They Suck? 1
The author has good points. After a few posts the author says something that catches my attention:
...
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27
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Modulation and Coding Scheme scaling
I have 2 of the same client devices using 802.11ax WiFi technology. One is configured to use 2 spatial streams and the other has 3. When they are connected to the access point at range (600ft or more),...
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169
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What is the Dot11 frame structure of an MLME-SCAN Request?
Within the 802.11 specification, I stumbled upon a set of primitives that describe that the AP effectively requests that the STA scan to start roaming to another AP. These primitives are comprised of
...
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85
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Wlan roaming mesh assumptions and authorization to fake AP
I have some questions and assumptions and I want to ask about them:
Based on topology in my picture: Assuming situation 1:
APs are configured just as APs with WPA3 Personal, they don't know about each ...
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2
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49
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Is this possible or am I just seeing things?
I was just playing around in the properties section of my student accommodation's 5ghz wifi network and upon scrolling down in MS settings where it describes the specs of the network I realized that ...
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1
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331
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Bad connection with 30 clients on a Ruckus R750 router
I have 30 Win 10/11 laptop gaming computers in the office. I put a Ruckus R750 (AX) in the office and provide the wireless connection for the computers.
When 30 computers start to visit a website like ...
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4
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7k
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Why is the 6 GHz band not working with my Wi-Fi 6 card?
I've recently installed an Intel Wi-Fi 6 AX210 controller to test 6 GHz wireless networks. The specifications clearly say that the device supports 2.4, 5 and 6 GHz bands, but the iw list shows that ...
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616
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Is it possible to send 802.11 data frames manually without monitor mode?
I am trying to determine whether it is possible to send 802.11 packets manually without first enabling monitor mode on the wireless adapter.
Basically, I want to be able send a normal data packet (...
- 183
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2
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3k
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Can I use a USB Wireless Adapter to receive WIFI 6 on an old laptop?
My apartment only provide WIFI 6 network. But my wireless network adapter driver version was around 2017.x, which is too old for WIFI 6. Plus the system version of my laptop is also too old, I cannot ...
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Windows 10 does not detect Wi-Fi as metered connection
I want Windows Wi-Fi client to detect wireless connection as metered connection.
I found that 802.11 protocol supports vendor-specific information elements (IEs). Those IEs are injected into beacon ...
- 239
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711
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Wireshark in windows 10 not showing "80211" header for Link Layer Header column
I am trying to capture Wi-Fi frames and check few parameters of 802.11. For that, I was trying to set the Link Layer Header of Capture Options in the wire shark. The drop down of the Interface WiFi is ...
- 141
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590
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Can 802.11 a/b/g/n adapter sniff a b g n traffic simultaneously in monitor mode?
I have wifi adapter based on rt5572 which supports a/b/g/n. And let's say I have Mixed mode wifi network where there is AP and a, b, g, n wifi clients all in the same network.
The questions I have:
...
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Is there a limit of connected devices in TDLS (802.11z)?
I know handshake and link establishment is done at routing level, and then the link works on switching level allowing devices to talk without causing any latency or work burden on the AP, but is there ...
- 121
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271
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What is the maximum size of a 802.11s wireless network?
How many nodes is it theoretically, and practically, possible to have in an 802.11s network?
- 773
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1
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860
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Only one WIFI mesh network node can apparently see the other node(?). How might i troubleshoot it?
I'm trying to set up a wifi mesh network on/between a PC and a Rasberry Pi 4b (not using the onboard wifi). But seem to have hit a snag on the PC node side.
For some reason, apparently only the ...
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1
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802.11ax monitor mode captures very few packets
I am using an ASUS RT-AX88U router and a Samsung Galaxy S10 to transfer 802.11ax packets. Using iperf3, I can get speeds of up to 900 (!) Mbps.
I use a laptop with an Intel AX200 chipset put in ...
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2
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19k
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How to connect Echo Dot to University protected wifi
I recently won an Echo dot in a Hackathon and I was very excited to try it out but sadly the dot does not connect to 'Eduroam', the university network. The Uni site says that eduroam uses '802.1x ...
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211
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Problems with switching between Wi-Fi APs (roaming)
I had one Wi-Fi router at home but it wasn't enough to cover every room and I had another one lying around so I decided to connect them to cover more area.
The basic config is following:
┌───────┐ ...
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1
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624
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Getting “wlan0: Association Request to driver failed” error when using Raspberry Pi 3b+ as client to perform fast handover using 802.11r
I am trying to use a Raspberry Pi 3b+ as a client to perform fast handover (802.11r).
I am using wpa_supplicant-2.6 and I have also enabled 802.11r while I was building it from the source code.
It ...
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565
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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 ...
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2
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766
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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 ...
- 101
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2k
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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 ...
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1
answer
135
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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'...
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1
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480
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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 ...
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1k
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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 ...
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1
answer
45
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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 ...
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343
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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 ...
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1
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487
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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 ...
- 217
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917
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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 ...
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77
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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 ...
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2k
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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 ...
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2
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458
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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 ...
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1
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1k
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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 ...
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1
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10k
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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 ...
- 105
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2
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6k
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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 ...
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1
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1k
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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 ...
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1
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974
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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 ...
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3
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1
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116
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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 ...
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1
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591
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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 ...
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2k
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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 ...
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0
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1k
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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 ...
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1
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2k
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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 ...
- 572
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2
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4k
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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 ...
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4
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1
answer
19k
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How do I force 2.4 GHz Wi-Fi on Mac OS X v10.10 (Yosemite)?
I would like to force 2.4 GHz Wi-Fi on my MacBook Air, because where I am currently, everyone is on 5 GHz, and it has been clogged up, so it’s really slow.
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1
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306
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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 ...
- 11
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1
answer
1k
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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?
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552
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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 ...
- 1,213
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2
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199
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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 ...
- 73
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1
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694
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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 ...
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