View available wireless networks in range in Windows 7. Whether you are currently connected to a wireless network or not, you can at any point view all the . In this tutorial, we will show you how to find a wireless network, how to gage their signal strength, if you have a choice of networks you can use (with a few words of caution), and why you might not be able to see a particular network.
Can Link-flap setting use to detect frequent linkup and linkdown on a switch port? A new generation of Wireless Local Area Networks (WLANs) will make its appearance in the market in the forthcoming years based on the amendments to the IEEE 802.11. Using Technology to Prevent and Detect: The following articles will help parents and mentors understand more about using technology as a tool for identifying risk and.
This is how you find wireless networks in the area in Windows 7: First, click on the wireless icon inside the taskbar (if you don't see it, just click on the . Here's the icon in question: As soon as you do, Windows 7 will show the available wireless networks in the area inside a mini . Just like cell phone reception, Windows 7 uses small vertical bars to give you some information on the strength of a wireless signal: the more green bars it has, the stronger it is (and the faster and most reliable your internet connection would be if you connected to it). Of course, not all wireless networks can be accessed: for a . Windows 7 will display a warning sign next to unsecure wireless networks: If there are many networks in range, Windows 7 will display a scrollbar to let you navigate through the listing of wireless network names - the ones near the bottom are the weakest signals. Windows 7 Tip: why can't I see my wireless network?
The most common reason for which the wireless network you are looking for may not be visible (assuming that the router is turned on and that you have not disabled the wireless radio or network adapter of your computer), is that the network is configured not to broadcast its name / SSID to other computers. This is just a safety measure - talk to your system administrator or the person in charge of setting up wireless internet in your house / company / dorm, etc.
Wireless sensor networks are also used for the collection of data for monitoring of environmental information, this can be as simple as the monitoring of the. Arslan, “A survey of spectrum sensing algorithms for cognitive radio applications,” IEEE Communications Surveys and Tutorials, vol. My Laptop cannot connect to any wireless networks even though it has before. It doesn't list any wireless networks at all, so I can't connect. I've tried turning it. What is a Wireless Sniffer? A wireless sniffer is a type of packet analyzer. A packet analyzer (also known as a packet sniffer) is a piece of software or hardware.
Securing Wireless Networks . If your home, office, airport, or even local coffee shop has a wireless connection, you can access the network from anywhere that is within that wireless area.
Wireless networks rely on radio waves rather than wires to connect computers to the internet. A transmitter, known as a wireless access point or gateway, is wired into an internet connection. Hotspots have identifying information, including an item called an SSID (service set identifier), that allow computers to locate them.
How do wireless networks work? As the name suggests, wireless networks, sometimes called WiFi, allow you to connect to the internet without relying on wires.
Computers that have a wireless card and have permission to access the wireless frequency can take advantage of the network connection. Some computers may automatically identify open wireless networks in a given area, while others may require that you locate and manually enter information such as the SSID. What security threats are associated with wireless networks?
Because wireless networks do not require a wire between a computer and the internet connection, it is possible for attackers who are within range to hijack or intercept an unprotected connection. A practice known as wardriving involves individuals equipped with a computer, a wireless card, and a GPS device driving through areas in search of wireless networks and identifying the specific coordinates of a network location. This information is then usually posted online. Some individuals who participate in or take advantage of wardriving have malicious intent and could use this information to hijack your home wireless network or intercept the connection between your computer and a particular hotspot.
What can you do to minimize the risks to your wireless network? Change default passwords - Most network devices, including wireless access points, are pre- configured with default administrator passwords to simplify setup. These default passwords are easily found online, so they don't provide any protection. Changing default passwords makes it harder for attackers to take control of the device (see Choosing and Protecting Passwords for more information). Restrict access - Only allow authorized users to access your network. Each piece of hardware connected to a network has a MAC (media access control) address.
You can restrict or allow access to your network by filtering MAC addresses. Consult your user documentation to get specific information about enabling these features. There are also several technologies available that require wireless users to authenticate before accessing the network. Encrypt the data on your network - WEP (Wired Equivalent Privacy) and WPA (Wi- Fi Protected Access) both encrypt information on wireless devices. However, WEP has a number of security issues that make it less effective than WPA, so you should specifically look for gear that supports encryption via WPA. Encrypting the data would prevent anyone who might be able to access your network from viewing your data (see Understanding Encryption for more information). Protect your SSID - To avoid outsiders easily accessing your network, avoid publicizing your SSID.
Consult your user documentation to see if you can change the default SSID to make it more difficult to guess. Install a firewall - While it is a good security practice to install a firewall on your network, you should also install a firewall directly on your wireless devices (a host- based firewall). Attackers who can directly tap into your wireless network may be able to circumvent your network firewall—a host- based firewall will add a layer of protection to the data on your computer (see Understanding Firewalls for more information). Maintain anti- virus software - You can reduce the damage attackers may be able to inflict on your network and wireless computer by installing anti- virus software and keeping your virus definitions up to date (see Understanding Anti- Virus Software for more information).
Many of these programs also have additional features that may protect against or detect spyware and Trojan horses (see Recognizing and Avoiding Spyware and Why is Cyber Security a Problem?