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WIFI Wireless Communication

Wireless communication - WIFI

A wireless network is a network that uses radio waves to transmit information.
In a wireless network, the air is used as a medium that connects the network components.
Examples of types of wireless communication:
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• Cellular networks

• Radio broadcasts

• Satellite TV
Wi-Fi

We deal with a type of communication called Wi-Fi.

This communication is based on the 802.11 standards of the IEEE organization.

Compliance with standards allows:

• Simultaneous work with equipment from different manufacturers.

• Backward compatibility and support of previous generations standard

• Maintaining high safety standards

Wi-Fi Channels

The device allows transmission and reception in two frequency ranges:

• 2.4GHz (802.11b/g/n)

• 5GHz (802.11a/n/ac) - problematic to import to Israel

• The 802.11n standard is mostly based on 2.4GHz but allows work in both areas.

The 802.11ac standard is mostly based on 5GHz but allows work in both areas

Applications of a wireless network - WIFI

AD-HOC-WIFI
An Ad-Hoc network is an unmanaged network in which all consumers communicate with each other without a defined hierarchical structure.
It is not recommended to implement Ad-Hoc networks with more than two wireless components, in order to avoid mutual interference and a decrease in network performance.

Point To Point (WDS Bridge-WIFI- a configuration in which 2 wireless units are configured to work exclusively with each other. This way of working is the best replacement for physical tethering among the range of Wi-Fi based solutions. An ideal solution for many situations. For example:

Situations in which it is not possible to transfer a physical chain.

Link between buildings or remote sites.

Video transfer from security cameras to a central hub.

Connecting controllers and monitoring units


Infrastructure

Sometimes called Point To Multipoint

In this configuration the network is managed by one or more access points responsible for the communication in the space.

The access point can come as an independent unit or integrated into the router.

All stations transmit to the access point and only to it and it routes the packets as required.

In normal Infrastructure systems, each Access Point (access point) functions as an independently managed unit regardless of the other access points in the network.

Controller-based systems have a central unit
(in hardware or software) that controls all aspects of management and control of the wireless network.

Advantages of a controller-based system over standard solutions

Enables the management of a large number of access points from a single management point and with a few button presses

Service Zones - division into several virtual networks and determining permissions and mutual relations.

Automatic load distribution (number of users) between the access points

Roaming management between access points

A variety of capabilities to identify and filter users and advanced security options

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