EXAMINING WIRELESS COMMUNICATIONS Flashcards
What are wireless communication?
An unbounded form of transmission media that uses radiated energy to transmit signals
Examples include 802.11 Wi-Fi, Cellular (CDMA, GSM, UMTS, HSPA/HSPA+, LTE, 5G), Satellite, Bluetooth, and Infrared.
What is CDMAone?
Code Division Multiple Access (CDMA) 2G technology that uses code-based multiplexing for multiple users
Allows simultaneous transmission of several communications over a single channel.
What is GSM?
Global System for Mobile Communications, a 2G technology that utilizes time division multiplexing (TDMA)
Widely adopted globally, known for SIM card use.
What is UMTS?
Universal Mobile Telecommunications System, a 3G standard offering higher data rates
It is part of the evolution of mobile communication standards.
What does HSPA/HSPA+ stand for?
High-Speed Packet Access, an enhanced 3G/3.5 technology improving speed and capacity
It represents advancements in mobile network capabilities.
What is CDMA2000?
A CDMA-based 3G technology providing better speeds for multimedia and mobile Internet
It does not use a SIM card but relies on Electronic Serial Number (ESN).
What does LTE stand for?
Long-Term Evolution, the standard for 4G wireless broadband technology
It offers increased network capacity and speed for mobile and data communications.
What is 5G technology?
The latest generation of cellular network technology providing higher speeds, lower latency, and greater capacity than 4G LTE
Supports a vast network of IoT devices and new applications like autonomous vehicles.
What is a SIM Card?
Subscriber Identity Module card, a small, removable smart card used in mobile devices to store data for GSM, UMTS, and certain LTE networks.
What frequency band does Bluetooth operate in?
Bluetooth operates in the 2.4 GHz ISM band.
What is the basic rate of Bluetooth 1.x?
The basic rate of Bluetooth 1.x is 1 Mbps.
What is the range of Bluetooth 1.x?
Bluetooth 1.x has a limited range of 10 meters.
What is the range of Bluetooth 2.x?
Bluetooth 2.x has a range around 30 meters.
What data transfer rate does Bluetooth 2.x support?
Bluetooth 2.x introduced Enhanced Data Rate (EDR) for faster data transfer up to 3 Mbps.
What feature was introduced in Bluetooth 2.1?
Bluetooth 2.1 introduced Secure Simple Pairing (SSP) for improved pairing experience.
What is the range of Bluetooth 3.x + HS?
Bluetooth 3.x + HS has a range around 30 meters.
What is the maximum data rate for Bluetooth 3.x + HS?
Bluetooth 3.x + HS allows high-speed data transfer utilizing Wi-Fi for data rates up to 24 Mbps.
What improvements were made in Bluetooth 4.x?
Bluetooth 4.x (Bluetooth Low Energy or BLE) has a range of 60 meters and focuses on significantly lower power consumption.
What is a key feature of Bluetooth 4.2?
Bluetooth 4.2 improved privacy and increased data capacity.
What are the enhancements in Bluetooth 5.x?
Bluetooth 5.x increased range (around 240 meters), speed (up to 2 Mbps for LE, 50 Mbps for EDR), and broadcasting message capacity.
What features were introduced in Bluetooth 5.1 and later?
Versions 5.1 and later introduced direction-finding features for better device location.
What improvements does Bluetooth 5.2 offer?
Bluetooth 5.2 improved efficiency and support for LE Audio, including features like Audio Sharing and Broadcast Audio.
What is a characteristic of IrDA infrared communication?
IrDA infrared communication requires line-of-site and is easily obstructed, with a range of 3ft/1m.
What is the speed of SIR (Serial Infrared)?
SIR (Serial Infrared) has a standard speed of up to 115.2 kbps.
