About this Video

• Video Title: Cellular Standards - CompTIA A+ 220-1101 - 1.4
• Channel: Professor Messer
• Speakers: Professor Messer
• Duration: 00:07:26

Introduction

This video from Professor Messer explains different cellular network standards, starting from 2G (GSM and CDMA) and progressing through 3G, 4G (LTE), and 5G. It also covers related concepts like Preferred Roaming Lists (PRL) and using a phone as a Wi-Fi hotspot. The video aims to provide a clear understanding of cellular technology evolution and its impact on mobile devices.

Key Takeaways

• 2G Networks (GSM and CDMA): The initial cellular networks, primarily used for voice calls with limited data capabilities. GSM (Global System for Mobile Communications) dominated the global market, while CDMA (Code Division Multiple Access) was more prevalent in the US. GSM used SIM cards for user profiles.
• 3G Technology: Introduced in 1998, it offered significantly improved data speeds (several megabits per second), enabling features like GPS, mobile TV, and streaming media.
• 4G LTE (Long Term Evolution): A converged standard combining aspects of GSM and EDGE, providing much faster data speeds (up to 150 Mbps, and even 300 Mbps with LTE Advanced). It unified the disparate GSM and CDMA networks.
• 5G Networks: The latest generation, offering dramatically increased speeds (potentially up to 10 Gbps), enabling enhanced functionality for mobile devices and the Internet of Things (IoT).
• PRL (Preferred Roaming List): An update for mobile devices that helps them identify appropriate network towers. These updates are often Over-The-Air (OTA).
• Wi-Fi Hotspot: The ability to use a mobile phone's cellular connection to create a personal Wi-Fi network for other devices. Providers may charge extra for this functionality.

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