Question

What uses high frequency radio waves or signals to connect devices in MS Access?

Answer 1

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Answer 2

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Explanation:

Abstract

The development of smartphones and other portable devices has expanded new ways of communication and collaboration both in private and business settings where there are used e.g. for sharing files and other information. However, this communication is not always secure and can be intercepted by a third party in the vicinity. This paper proposes an intelligent communication control mechanism where the shared information is accessible only within a physically limited space. Normally, existing communication methods based on radio waves (Wi-Fi or Bluetooth) are accessible to anyone within a specific range; thus, they are susceptible to breach and communication eavesdrop beyond walls. Our proposed method is based on an association scheme whereby the sending smartphone can restrict the communication range by controlling an acoustic wave’s magnitude and frequency. Thus, unlike radio waves, it is possible to send the signal to devices located in a specific range, where the client devices exist, after recognizing the distance and angle between devices. Our experiments by sharing signals among smartphones indicate that it is possible to unidirectionally control the sharing range while sharply reducing any possibility to eavesdrop on the communication.

Introduction

Data sharing and communication has traditionally been at the forefront of the disruptive technology since the heyday of the World Wide Web. Email, instant message, and VoIP services nearly obsoleted the need for typed letters and telegrams and have noticeably reduced the need for in-person communication. The development of client-server model and Device-to-Device (D2D) communication services further improved file sharing, albeit at the risk of copyright infringement. For instance, AirDrop, which can be used by products of Apple, is popular as D2D communication [1]. Further, cloud-based synchronization and sharing services such as Dropbox, iCloud and Google Drive are used for collaboration and data sharing to the next level. The benefits gained from client-server model communications include cost and time savings, knowledge and expertise dissemination. Contemporary communication methods were introduced due to advances in hardware and software. For example of D2D communications, Infrared Data Association (IrDA), Near Field Communication (NFC), or Wi-Fi Direct [2] have been used for data sharing. This further improved collaboration and data sharing.