A network repeater is a device used to expand the boundaries of a wireless local areanetwork. In the past, wired repeaters were used to join segments of Ethernet cable. Modern Ethernet networks use more sophisticated switching devices, leaving the wireless flavor of the network repeater a more popular device for use with wireless LAN at work and home. WLAN offer tremendous convenience, but a drawback of these systems is the limited area covered by wireless signals. Obstructions and other common electronic devices interfere with and degrade signal strength. This can make it difficult to connect from a basement, back room, or upstairs office, depending on placement of the wireless router and other variables. So we use network repeater for this problem. A WiFi repeater will pick up the signal from a wireless router and amplify it, propagating signal strength to boost the distance and coverage of the WLAN.
WiFi also spelled Wi-Fi is a wireless networking technology used across the globe. It refers to any system that uses the 802.11 standard, which was developed by the Institute of Electrical and Electronics Engineers and released in 1997. A person or business can use a wireless router or similar device to create a "hotspot" or area in which appropriate devices can connect wirelessly to a network or gain Internet access.
Computers with appropriate network cards can connect wirelessly to a proper router. This router is usually connected to the Internet by means of a modem, often one featuring a high-speed connection. Any user within 200 feet or so of the access point can then connect to the Internet, though for good transfer rates, distances of 100 feet or less are often suggested.
A WiFi amplifier is a device that can improve the strength of a wireless networking signal. The term WiFi amplifier can refer to a replacement antenna that produces a significant signal gain, through repeaters, and even passive antenna augmentations, are sometimes referred to as amplifiers.
Antenna based amplifiers are typically designed to replace stock antennas on wireless routers. These amplifiers typically require an external power source to boost the signal.
Repeaters are separate devices that can be placed at the edge of a wireless signal to rebroadcast it into a dead zone.
There are a number of different devices that are commonly referred to as WiFi amplifiers, though most of them do not actually amplify anything. These devices are often installed in place of the factory antenna, and contain circuitry that is capable of boosting the transmission signal. Some of these amplifiers can also be installed in-line with a high gain antenna, which can improve both transmission power and the ability to receive weaker signals.
Free WiFi or hotspots are public places where Internet connectivity is available to anyone within broadcasting range. Generally, it’s safe to use hotspots with a few common sense rules.
- Hotspot networks are often unencrypted, as encryption would require log-on credentials for each person joining the network, hampering accessibility. Networks that don’t require credentials are easy for anyone to jump onto with little or no user direction.
- A wireless router broadcasts all dialog taking place between itself and connected computers.
- As a precaution, users might avoid visiting websites that send usernames, passwords or email in the clear when using free WiFi.
- It is safe, however, to use hotspots for accessing sites that provide end-to-end also called point-to-point encryption. End-to-end encryption is automatically put in place when visiting a site with an address that starts with https. In this case, the browser will encrypt all communication before it leaves the computer, and it will only be decrypted at the destination site.
- While free WiFi is safe for secure websites, highly sensitive activities should only be performed from a person's home computer. A public computer should not be trusted for anything but casual surfing. Computers store passwords, usernames and other revealing data in a type of memory called cache, making it possible to retrieve later by others.
A wireless TV router is a device that allows a television signal to be broadcast to other areas of a building without cables. The wireless TV router could send a signal to a computer or a video projector for use on a large screen. A number of different devices have been introduced by various companies, providing options for people in need of remote entertainment solutions.
The basic way in which a wireless TV router functions is by broadcasting a television signal through radio waves or similar methods. These routers typically have an input connection that can be plugged into a cable box, allowing the router to receive a signal from that box. Output from the router is then transmitted wirelessly, allowing other devices to pick up this signal through an antenna.
If you have a wireless network installed in your home, you know that getting perfect reception can be tricky. Things like the simplest electrical devices can cause enough interference to reduce your wireless network range by up to 30%-40%. You can improve your range by installing the router away from other electronics, changing the channel, and using a hi-gain antenna.
Your wifi router must be installed in a central location, preferably mounted on a wall, and as far away as possible from other devices also running on 2.4 GHz, such as microwave ovens, baby monitors, and cordless phones. Even Bluetooth gadgets can cause trouble and affect the range of your wireless network. Anything from closed doors to odd corners can cause interference, so try to install the wireless router as close as possible to the source. Metal objects in general can also cause interference, as do windows and electronics.
Sometimes, you have no choice but to upgrade your wifi router if you want to noticeably improve its range. Old wifi routers have an output of 11 mbps, while the latest models can reach 300 mbps.
A wireless device can refer to any kind of communications equipment that does not require a physical wire for relaying information to another device. Wireless headphones fitted with a receiver use either radio frequency (RF) or infrared technology to communicate with a transmitter that is connected to the sound source.
In order to join a wireless LAN, a computer must have a wireless network card or adapter installed. A network card is an internal wireless device manufactured to use the same language or protocol that wireless routers use. If a router uses a protocol that is not supported by an internal wireless device, an external wireless adapter can be used in an external port. The most common type is a USB dongle, but wireless network adapters are also available in Express Card formats, giving laptop users a choice as to which port they would rather use.
A device that can use Wi-Fi can connect to a network resource such as the Internet via a wireless network access point. An optional feature added in 2007, called Wi-Fi Protected Setup (WPS), had a serious flaw that allowed an attacker to recover the router's password.The Wi-Fi Alliance has since updated its test plan and certification program to ensure all newly certified devices resist attacks. The use of WPS greatly reduces the time required to gain access by the use of so called "brute force" attacks.
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