135

The failure of Wi-Fi APs to pick 2.4GHz channels well comes down to a small handful of issues: Most only pick a channel at boot time, but a channel that was good when the AP was last rebooted may have become a poor choice days, weeks, or months later. Most do not want to delay booting by spending long enough to truly evaluate every channel, so they use poor ...


51

The overarching problem here is that the 2.4GHz band is completely saturated in any moderately populated area. In addition, there are only 14 channels, depending on country, available to use. Out of those 14 only 3 channels don’t overlap and interfere with each other. And that is only true if the device uses only 20MHz of bandwidth and not the 40MHz ...


45

I believe this boils down to what is—very sadly—a common wireless headache: 802.11n Wi-Fi implementation is so horrible and inconsistent between devices that the 802.11n protocol becomes fairly useless. This PC World magazine article titled, “Wireless Routers: The Truth About Superfast Draft-N” summarizes the headaches quite well; bold emphasis is mine: ...


23

Its related to screen casting - which uses miracast and wifi direct. The feature is called "Projecting to this PC" and found under "connect" in the action center . Its a new feature with windows 10 anniversary update, and lets you use miracast to send the output from one system to another (works with my android marshmallow android phone as well, to an ...


17

This page (Option Three) helped me solve my issue. In Registry Editor, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkList\Profiles. I deleted the profiles for "[SSID]" and "[SSID] 2". Rebooted and connected to router. Problem solved.


16

This is an older question but I just wanted to add my answer here because this question came up when I was searching for an answer and it pointed me in the right direction. If your nameservers point to something that you once manually entered in the TCP/IP properties, this setting is cached in the registry under Computer\HKEY_LOCAL_MACHINE\SYSTEM\...


15

I had the below Windows 10 Wi-Fi issue: “Can't connect to this network” while every other wireless devices worked, this newly upgraded Windows 10 did not. The below helped: In Device Manager, right click on Device → Properties → *Advanced and I disabled 802.11n mode. It may slower on actual wireless N networks, but it resolved the problem for the ...


15

Google's _nomap must appear at the end of the SSID while the Windows _optout can be anywhere in the SSID, so this should work based on the docs below: SSID_optout_nomap https://privacy.microsoft.com/en-us/windows-10-open-wi-fi-hotspots: ...you can opt your network out by including _optout somewhere in the Wi-Fi network name (also called the SSID). For ...


14

For your specific situation where you use an Intel network card on Ubuntu 14.10 (which has a kernel newer than 3.13), a change in the iwlwifi driver can possibly have affected the throughput of your Intel wireless network card. This change can be be reverted by creating the file /etc/modprobe.d/iwlwifi.conf containing: options iwlwifi 11n_disable=8 To ...


13

Just to be clear, that card can use either band, but it can't use both at the same time. That is, it's not "simultaneous dual-band" which is also called "dual-band concurrent". I'm not aware of any client card that is. Simultaneous dual-band support is something only APs do, in order to support legacy 2.4GHz clients and more modern 5GHz clients at the same ...


13

You cannot broadcast your network to only specific devices. You either broadcast it publicly with a good password, or you don't broadcast it at all (i.e. it must be added manually by each device). Don't worry about manual adding though; once the network is added, each device is usually able to detect and connect to the hidden network automatically. Simple ...


13

Just adding a visual representation about the 2.4GHz congestion vs the 5GHz band to the already excellent answers. I live in an European capital with a strong Internet and Wifi market penetration. Furthermore, most local ISPs also add an extra roaming SSID/network by default in their router/modems/CPE and so often it is at least 1 SSIDx2 per home/...


12

Even after a reboot, I found "can't connect to this network" error. To resolve: open Device Manager (devmgmt.msc), locate the wireless network adapter, disable and then re-enable. Wireless connected back up immediately after doing so.


11

AFAIK, the Microsoft Virtual WiFi Miniport Adapter is a virtual adaptor for sharing your internet connection (ie. making a wifi hotspot, or 'hosted network'). To disable this, open an elevated command prompt (cmd as admin) and type in the following commands, in order: netsh wlan stop hostednetwork This stops the hosted network netsh wlan set hostednetwork ...


10

Set both access points to the same network name (SSID). Make sure both have the same network security settings, non-mixed, AES only, Same network keys, but on non-overlapping channels. Set the fist router lan address to the lowest available address in the subnet. Example: 192.168.1.1 /24 Set DHCP accordingly. Set the second router address to the highest ...


10

As Spiff mentioned, channel selection is usually only done during boot time, as periodic re-evaluation of utilization of alternative channels requires additional or better hardware. There is also no accepted standard on how APs should cooperate when selecting their channel. What would happen if all the APs in an area suddenly see that channel 6 is being less ...


9

Well Everybody answered the Question for Windows Platform only. So, I thought It would be useful to answer for Linux Platform too. On Linux you can do the following: Getting MAC Address of Devices connected in your network You can Use a number of tools for thus task such as Netdiscover, arp-scan, nmap and even WireShark. These tools are basically used in ...


7

It always uses the connection at the top of the service order. To set the service order open System Preferences. Go to Network. Click the cog at the bottom of the list of connections on the left hand side. Screenshot: Then drag and drop the connections in the order you'd like them to be prioritised. Screenshot: Click Ok, then Apply, and your wish is your ...


7

Direct quote from How Automatic Detection of Captive Portal works (follow link for full text) Basic strategy behind Captive Portal detection The Automatic Detection of Captive Portal mechanism is based on a simple verification, done by the Operational System (OS) of the client device (smartphone, tablet, laptop). It simply tries to reach a specific URL and ...


7

Two identically named SSIDs with the same password will allow your device to connect to either, without having to add any extra networks on your devices. If both routers are broadcasting from the same location, the expected behaviour will vary depending on device. For example, some devices will connect to whichever router has the stronger signal, others ...


7

It's probably routing a guest and private network - this is fairly common. There is an impact, but this can be managed, and it's better for the router to use the same frequencies rather then overlapping ones. (WIFI devices can manage co-ordinate sending across multiple AP's) CISCO has a nice paper on it - https://documentation.meraki.com/MR/...


6

The fact of the matter is that you are getting about the best speeds you should be on an 802.11 network with the hardware you are using. While your router is capable of higher data rates using multiple spatial streams, your Intel Dual Band Wireless-AC 3165 is only capable of using a single spatial stream. This means that it will never connect at data rates ...


6

In a high-congestion area where there are dozens of APs on 2.4GHz channels 1, 6 and 11, I sometimes get a more reliable connection by forcing 802.11b (the slowest mode), especially on less-used channels like 4 and 8. The bandwidth overlap diagram from wikipedia (below) suggests tantalizing clues why this might work, since the round bandwidth profile of 802....


6

Interesting question, and I didn't know the answer, so here is how I found out: The source code for 3.17 shows where the data comes from. In particular, The first group (5250 - 5330 @ 80) is the frequency range and maximum bandwidth for which this particular rule applies (so you don't need two rules for 40 MHz bandwidth and 20 MHz bandwidth) The second ...


5

Some additions to the other answers: Channel Number: Since you are using an Android phone (Sony Xperia P), I suggest you install the WiFi Analyzer app from the Play Store. This will show you which Wi-Fi channels in your neighborhood are more heavily used and which less. Go everywhere where you expect to have connectivity (some neighbor networks may only be ...


5

I restored my old WiFi driver using the steps found here because my new one was breaking the hosted network functionality. To restore a driver to its previous version You must be logged on as an administrator to perform these steps. Open Device Manager by clicking the Start button Picture of the Start button, clicking Control Panel, clicking ...


5

Log into your router and change the network name. I have fixed this issue on multiple laptops by doing this. It seems to simple, and like this it should have no bearing on connectivity, but it does.


5

It's because those devices are setup for WiFi-Direct. From a protocol point of view a Wi-Fi direct connection is established using already existing mechanisms in a number of steps: In a first step, the two devices that are to connect directly have to find each other. This is done by sending standard Wi-Fi probe request and response frames that ...


5

You can use PowerShell to configure your network. You can use these combinations to manually set addresses and reset them to automatic: Get-NetAdapter -Name "Your_Network_Adapter_Name" | Set-DnsClientServerAddress -ServerAddresses 8.8.8.8,8.8.4.4 Get-NetAdapter -Name "Your_Network_Adapter_Name" | Set-DnsClientServerAddress -ResetServerAddresses You should ...


5

You can specify what band your wireless card will connect to in the advanced driver settings found under your wireless card in device manager. If you don't want to connect to 2.4ghz disable the associated bands, i.e 802.11 b/g/n on 2.4ghz. This solution depends on your wireless card and driver's, but most wlan nics I have seen have these options. If you ...


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