EC EHE - Bluetooth Paste

 

Bluetooth is a short-range wireless communication technology that replaces cables connecting portable or fixed devices while maintaining high levels of security. It allows mobile phones, computers, and other devices to exchange information. Two Bluetooth-enabled devices connect through a pairing technique.

A Bluetooth stack refers to an implementation of the Bluetooth protocol stack. It allows an inheritance application to work over Bluetooth. A user can port to any system using Atinav’s OS abstraction layer. The below figure illustrates a Bluetooth stack.

Figure 8.33: Architecture of a Bluetooth stack

The Bluetooth stack has two parts: general purpose and embedded system.

 

A user can set Bluetooth in the following modes.



Discoverable Modes
Bluetooth operates in the following three discoverable modes.




Discoverable: When Bluetooth devices are in the discoverable mode, they are visible to other Bluetooth-enabled devices. If a device attempts to connect to another, the device attempting to establish the connection must search for a device that is in the discoverable mode; otherwise, the device attempting to initiate the connection will not be able to detect the other device. The discoverable mode is necessary only while connecting to a device for the first time. Upon saving the connection, the devices remember each other; therefore, the discoverable mode is not necessary for lateral connection establishment.
Limited discoverable: In the limited discoverable mode, the Bluetooth devices are discoverable only for a limited period, for a specific event, or during temporary conditions. However, there is no Host Controller interface (HCI) command to set a device directly in the limited discoverable mode. A user has to do this indirectly. When a device is set to the limited discoverable mode, it filters out non-matched IACs and reveals itself only to those that matched.
Non-discoverable: Setting a Bluetooth device to the non-discoverable mode prevents that device from appearing on the list during a Bluetooth-enabled device search process. However, it remains visible to users and devices that were previously paired with it or know its MAC address.




Pairing Modes
The following are the pairing modes for Bluetooth devices.


Non-pairable mode: In the non-pairable mode, a Bluetooth device rejects pairing requests sent by any device.
Pairable mode: In the pairable mode, a Bluetooth device can accept pairing requests and establish a connection with a device that requested pairing.
 

Comments

Post a Comment

Popular posts from this blog

Why Certifications Methods?

Hey there, Let’s take a step back and change our perspective: Approach certifications as a means to enrich your knowledge and skills, rather than merely a stepping stone to monetary gain or career advancement. Certifications should be about self-improvement and mastery , not just a checkbox on a resume. Embrace the journey of learning for its own sake, and watch how it transforms your personal and professional life in ways you never imagined. The Real Reason Behind Certifications The commercial marketing driving force of certifications is often centered around securing a new or better job. But I urge you to reconsider if this is your primary motivation . Take a moment to reflect on your personal development and your deepest interests within the realm of technology.  Is your passion in: Programming Crafting elegant code and solving complex problems? System Administration, Ensuring seamless operations and managing vast networks? Data Analytics Unraveling the stories hidden within data?
Read blog »

LPI E - ALL K.D.

Image
LPI Linux Essentials Outline All Knowledge Domains and Links to LPI One last check before test! Introduction to Linux >> 1.1 Linux Evolution and Popular Operating Systems >> 1.2 Major Open Source Applications >> 1.3 Open Source Software and Licensing >> 1.4 ICT Skills and Working in Linux Linux Evolution and Popular Operating Systems: This domain covers the history of Linux and its evolution, as well as an overview of popular Linux distributions. Major Open Source Applications: It focuses on introducing commonly used open source applications in the Linux ecosystem, such as LibreOffice, Firefox, and GIMP. Open Source Software and Licensing: This domain covers the concepts of open source software, different types of licenses, and their implications. ICT Skills and Working in Linux: It provides an overview of the basic information and communication technology (ICT) skills needed to work with Linux and explains the benefits of using Linux in variou
Read blog »

CCNP 03 - WANS

Image
WAN Problem Areas Certification Objectives Point-to-Point Protocols Switched Protocols      In this chapter, we will discuss troubleshooting point-to-point and switched protocols. It’s very important to understand the concepts and functionality of each protocol. We will discuss the HDLC and SDLC encapsulation methods, as well as both CHAP and PAP authentications via PPP. We will identify ISDN, Frame Relay, X.25, SMDS, and ATM transmissions and common problems associated with each of them. Point-to-Point Protocol      In the 1980s, the Internet really started to come to life due to its usage by the U.S. government, universities, and large corporations. These hosts were being supported by the Internet Protocol (IP) and connected via a series of LANs. The most common of these LANs was the Ethernet. Other hosts were connected through WANs, using technologies such as X.25. This eventually evolved into the need to transmit data via the original method used before networking was ever establis
Read blog »