A wireless network is any kind of computer network that is connected through a wireless medium, primarily known as using a wireless router creating a WLAN (Wireless Local Area Network).

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266
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4answers
327k views

How can I get the same SSID for multiple access points?

I need to upgrade my existing wireless infrastructure and this time I want 2 access points to cover my house, since I get blind spots no matter what with a single AP. I have physical cabling to my ...
184
votes
11answers
19k views

Why does my microwave kill the Wi-Fi?

Every time I start the microwave in the kitchen, our home Wi-Fi stops working and all devices lose connection with our router! The kitchen and the Wi-Fi router are in opposite ends of the apartment ...
137
votes
9answers
19k views

Is it really possible for most enthusiasts to hack people's Wi-Fi networks?

I heard from a trusted computer security expert that most enthusiastic users (even if they are not professionals) using only guides from Internet and specialized software (e.g. Kali Linux included ...
103
votes
4answers
21k views

How does Windows know whether it has internet access or if a Wi-Fi connection requires in-browser authentication?

In Windows 7, the notification area networking icon will show an error indicator if there is no internet access , and the error icon goes away once there is a successful connection to the internet . ...
72
votes
16answers
10k views

Paranoid Parent: “WiFi safe for baby?” [closed]

I am most likely being an overprotective parent but since the birth of our newborn, my wife and I have been wondering about credible studies dealing with Wi-Fi and health concerns. I love my Wi-Fi, ...
56
votes
9answers
78k views

Make Windows 7 ignore WiFi when ethernet is available

When I dock my Windows 7 laptop, I want it to prefer the wired ethernet connection over WiFi. This is a pretty straightforward thing to do on my Mac - I just reorder my network preferences, and it ...
51
votes
5answers
6k views

If there are 13 Wifi channels, can I only use 13 Wifi devices on the same room?

As wikipedia reference, 802.11 standards (which defines Wi-fi networks) tell us that wireless networks works with 13 different channels on OFDM (depending on the release, a, b, g or n). From this I ...
46
votes
6answers
19k views

Is looking for Wi-Fi access points purely passive?

Say I carry a Wi-Fi enabled phone or laptop through an area where there are WAPs. Assuming that I don't actively try to connect to them or otherwise interact with them, is it possible for the owner ...
38
votes
2answers
8k views

What's the maximum actual bit rate of an 802.11g connection?

Using a wired connection, I get a 38 Mbit/s download speed. When I switch to wireless one (Linksys WRT54GL router with Tomato firmware), the speed drops to 23 Mbit/s even if the distance between the ...
36
votes
4answers
73k views

How do I set my wireless network to be private instead of public?

Trying to maintain good security settings on my laptop, I want my home network to be interpreted as private and the university network at school to be interpreted as public. However, my home network ...
34
votes
2answers
69k views

RSSI value of wifi connection - how to interpret?

In Mac OS X you can obtain the RSSI value of your by wifi connection by holding Alt and clicking on the Wifi-indicator icon. My questions are: What range of values can RSSI take? What RSSI ranges ...
31
votes
3answers
62k views

Does it make sense to keep different SSIDs for 2.4GHz and 5GHz wireless networks?

My router can have different SSIDs for 2.4 and 5 GHz and I'm not sure if it's better to have the same SSID or not. Initially I put the same network but I got confused when the MacBook Pro displayed ...
30
votes
10answers
22k views

Can I make two wireless routers communicate using the wireless?

I want to make a setup like this: cable modem <-cable-> wireless router 1 <-wireless-> wireless router 2 in another room <-cables-> PCs in another room Basically, I want to extend my ...
28
votes
6answers
5k views

How to put fear of God (law) into Wi-Fi hacking neighbors [closed]

I live in an apartment and some new guys have apparently moved into one of the apartments. They have been shamelessly hacking into my WiFi. Mine was initially a WEP encrypted network and out of ...
27
votes
7answers
33k views

Is it better to use a crowded 2.4GHz Wi-Fi channel 1, 6, 11 or “unused” 3, 4, 8, or 9?

I understand that 2.4GHz Wi-Fi channels overlap, and that the most popular non-overlapping set of channels in the US is 1, 6, and 11. Generally, my signal strength on channels 1, 6, and 11 are much ...
26
votes
12answers
6k views

Which routers do you prefer for DD-WRT or OpenWRT? [closed]

I'm aware of the giant Supported Devices list. I'm wondering which ones you all prefer (e.g., support for Mega install, cheap, reliable hardware, USB port, etc.) I've used an ASUS WL-500G Premium ...
26
votes
2answers
16k views

How to launch a command on network connection/disconnection?

I have a wifi connection that requires to authenticate using a web form once the wireless link is established. I know how to automate the authentication with a script that uses curl/curlIE. But how ...
26
votes
5answers
2k views

How do I tell Windows to use 802.11 in preference to 3G?

I have a Samsung NC-10 netbook which I take to work every day. Most of the time I use it just on the train/bus, but I also use it at work and home. It has a built-in 3G card which I want to use when ...
26
votes
2answers
37k views

Does a wireless-N (802.11n) network have poor performance when in b/g “mixed” mode?

It seems to be an "old" wives tale that, when using a wireless-N router in "mixed mode" to support legacy 802.11b or 802.11g devices, the performance of 802.11n clients will suffer. Some places ...
25
votes
7answers
2k views

How can I protect myself while using public wifi hotspots?

I frequently need to access secure resources (gmail, banking, remote desktop, etc) while on public wifi hotspots. What can I do to ensure that nobody can sniff my passwords or my other browsing ...
23
votes
4answers
161k views

Make Windows forget a network connection password?

Is there a way to prevent Windows from remembering the network password after it connects? So that upon disconnecting Windows won't reconnect without re-entering password.
22
votes
6answers
6k views

Do cabled connections and Wi-Fi “use” the same bandwidth?

My brother likes to play games online on his Xbox. However, because he is far away from the router, he uses our Wi-Fi instead of an Ethernet cable. I, being closer to the router, use an Ethernet cable ...
22
votes
9answers
2k views

How to identify from a Windows computer the wireless device that is poisoning router?

I live in a house with various other people who all swear that there is nothing wrong with any of their devices. The problem being is that when wireless is enabled on the router, ping sky-rockets and ...
22
votes
6answers
1k views

How can I get a wireless signal inside a walk-in freezer?

I need to amplify our wireless signal into a large walk-in freezer. Currently, the signal gets everywhere around the freezer, but does not penetrate the steel walls. What would be the best and ...
21
votes
2answers
1k views

How do I check the internet usage of a particular device in my room?

I am living with 5 other people and most of our network is consumed in 20 days so we have to spend almost 10-11 days without Internet. I just wish to know what are the ways to monitor the internet ...
21
votes
6answers
18k views

Recommended gigabit 802.11n routers that work with DD-WRT [closed]

I've read this question, and checked out the supported devices list, but am looking specifically for a gigabit 802.11n router that is easy to find and fully supported by DD-WRT. It seems like some of ...
20
votes
4answers
26k views

How does a hacker in a public WIFI actually view your computer?

I've read that they can see what sites your viewing or even access your computer if you're connected on the same WIFI connection but how exactly?
20
votes
3answers
2k views

Small WiFi webcam for quasi-outdoor use

I’d like to have a webcam pointed toward my house, so that I can check (via Safari on iPhone) if I left the garage door open, if there’s a package on my doorstep when I’m off on a business trip, etc. ...
19
votes
2answers
2k views

Where does Windows 8 store the estimated data usage over Wifi?

I accidentally discovered that in Windows 8, if you right-click a previously connected wireless network from the Start screen interface, there's an option to show estimated data usage. Where's ...
18
votes
3answers
13k views

Can other people on an encrypted Wi-Fi AP see what you're doing?

If you connect to an open, unencrypted Wi-Fi access point, everything you do can be captured by other people within range. If you connect to an encrypted point, then people nearby can intercept what ...
18
votes
2answers
138k views

Is there a PC equivalent for the Android 'Wifi Analyzer' App? [closed]

I'm using the Wifi Analyzer app on my phone a lot at the moment as I need to set up and test some wireless networks. For people unfamiliar with the app, i've posted some screenshots of the app that I ...
17
votes
4answers
30k views

When concurrently connected to wired and wireless ensure Windows 7 uses wired connection

When I am at my desk and my laptop is in its docking station I want to ensure that it uses its wired connection and not my wireless network. I am hoping/guessing that the preference in connection is ...
16
votes
6answers
1k views

Will the ethernet pull bandwidth if unplugged?

I'm fairly certain that this isn't a problem, but like a phone charger it will still pull electricity even though you aren't charging anything if you leave it plugged into the wall. Though minimal it ...
16
votes
7answers
7k views

How to extend Wi-Fi signal across rooms?

I moved into a new place and my old Wi-Fi router just doesn't have the range to get into all the rooms. I've been investigating a lot of options and I'm wondering what other folks have done here. ...
16
votes
2answers
2k views

Is securing Wifi with MAC Filter enough?

I have a MAC filter in place for everything that connects to my router. I also have WPA2 on the wireless. When a friend comes around, I tell them the password (I trust them), they type it into their ...
16
votes
1answer
258 views

Getting internet to a protest

I'm not sure if this is the right place to ask this question, but it's been in the back of my head for a while. I am in Turkey, where there are thousands of protestors gathering in the street against ...
15
votes
12answers
2k views

What is the most practical security method for a home wireless network?

Quoting Ars Technica: Proper wireless network (802.11a/b/g/n) security is quite simply out of reach for most organizations. ... Given that WEP (both 64- and 128-bit), WPA1/2 (PSK), and ...
15
votes
6answers
69k views

How to see who is using my WiFi

I have WiFi router at home and would like to know if there is any way to know who is connected to my WiFi network and using it. My WiFi network is password protected but still there could be a chance ...
15
votes
7answers
590 views

Common mistakes on home wireless network

Besides not setting a password, what are other common mistakes made when setting up a wireless network?
15
votes
2answers
55k views

How do I get a 300Mbps connection over 802.11n?

I just bought a new wireless setup, consisting of a Cisco E2000 router, Edimax 7718un USB adapter for my laptop and an Edimax 7728in PCI adapter for my HTPC (which isn't in a location I can run cat5 ...
15
votes
3answers
35k views

Where Are Wireless Passwords Stored on Mac OS X?

After the Snow Leopard update I can't connect to my home wifi router. I removed it from Network Preferences and from Keychain but when I reconnect it will not ask me for the password. All other ...
15
votes
4answers
22k views

Display list of computers on a LAN in Linux

I'm a web dev who is trying to get a better handle on security. I'm trying to figure out a way (on Linux/Debian based distros) to list all computers on the same LAN my netbook is on. I tried "arp -n" ...
15
votes
6answers
8k views

Is https traffic over an unencrypted wireless network secure?

This is something I've wondered for a long time. If I am, say, using Gmail over https, can someone read my IM conversations and emails if I use an unsecured wireless network? I assume that the data ...
15
votes
1answer
10k views

List Available Wireless Networks from Command Line

I'm currently trying to do some physical debugging with one of our devices. It would be very useful to be able to use a command to output a list of available wireless networks to the command line or ...
14
votes
3answers
4k views

How does Wi-Fi modulate the electro-magnetic wave?

Not sure if this is the right site for this question, but mine is a simple one: Is Wi-Fi AM, FM or a combination of them both?
14
votes
2answers
2k views

Is Bluetooth faster than Wi-Fi?

I notice that on my iPhone, when I use my personal hot-spot to distribute Wi-Fi, if I have Bluetooth enabled, the phone will make a Bluetooth connection to my laptop instead of a Wi-Fi connection. ...
14
votes
2answers
1k views

If two devices are emitting a wifi signal in the same frequency at the same time and reach an antenna at the same time, how can the data not overlap?

I mean, I know each packet is sent with a MAC address, but what about streaming? What happen if while the router is receiving one packet, a packet from another device arrives? How can the router ...
14
votes
3answers
27k views

Laptop wireless networking options: 1x1 vs 2x2

I am currently customizing a Lenovo Thinkpad. Under the section "Integrated WiFi wireless LAN adapters" there are two options. Default: ThinkPad 1x1 b/g/n Upgraded: ThinkPad 2x2 a/b/g/n (+$10 AUD) ...
14
votes
3answers
26k views

How does Google Chromecast connect to secured wifi?

Google Chromecast can be set up by going to the setup page on a supported device. But in technical terms, what is actually happening on your device that configures the Chromecast dongle? For ...
14
votes
2answers
5k views

How to run a program when connecting to a specific network in Windows 7

I want to have an executable run every time I connect to my wireless network at home. The purpose is to sync a folder on my laptop with my desktop machine. Is there any way run a program or script ...