There is any number of possible frequencies that are WLAN might use. This depends on local frequency availability, but it sometimes pertains to licenses permitting operators to use certain ones to provide their services or to established standards. For example, a wireless residential alarm system is one type of WLAN. Indeed, the alarm system with a central control unit and remote sensors for the doors and windows may not be internet-enabled at all.
Tech equipment may be set up to work with one or more frequencies or to conform to established standards such as Wi-Fi. With the aforementioned alarm system, it may broadcast wirelessly at MHz. Likely only the alarm sensors and central control unit use this frequency. However, Wi-Fi is an established standard known as The standard has enabled manufacturers of routers, network cards, and other networking devices to create products that can all communicate using the same frequency and an identical communication protocol.
This is why a set-top box, a router, a PC, or your smartphone all have access to Wi-Fi, and it works pretty seamlessly. In LAN, the devices communicate over a physical communication channel allowing moderate data rates. It allows computer and other devices to connect with the Internet in proximity of an access point. It is the name that is used to signify Wireless LAN product interoperability. LAN consists of three important hardware elements — A transmission medium A control mechanism for the transmission over the medium Interface for the network LAN is typically owned by an organization that uses it.
There are three basic physical topologies of LAN — Ring — A loop like structure is formed comprising of computers and these cimoputers tak turns for communicating the message.
Bus — All devices are linked with a single transmission line by using a cable. Star — All devices are connected to a central piece of hardware known as hub. Benefits Resources like hardware, files and softwares are easily shared Flexibility Security Facility for centralized backups Audit trails Cost accounting No need of wires to connect the devices Easy creation of a mesh Wi-Fi Technology is standardized and thus allows one to connect to the network in any country.
Image Courtesy: excellgroup. Add new comment Your name. As of fall , the newest draft standard, Wifi signals can successfully transmit data without loss of integrity from roughly to feet 30 to 50 meters , depending on the wifi version used. Security can be a concern with wireless technologies, as eavesdroppers can monitor unprotected data traffic.
However, secure configuration is basic to wifi networks, and users can enable password protections and traffic encryption by following accompanying software instructions.
Wireless Internet is just one of the services that wifi optionally supports. Wifi is a wireless communication standard used between computer devices to share files and resources. The wifi signal cannot travel long distances without loss of integrity, and it is therefore used for Local Area Networks LANs.
In the home, a wireless LAN might include a personal desktop system and laptop, while in the workplace, a wireless network commonly connects numerous computers within a commercial building. The wifi signal might also cover a small region within a city, creating hot spots or places where the wifi signal allows connectivity to the public through wireless access points WAPs.
A wifi network is very easy to set up. The main computer acts as a server with a wireless network interface card NIC. The wireless NIC features a small antenna that broadcasts and receives wifi signals.
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