Solution

The correct answer is A - III, B - IV, C - I, D - II

Key Points

         A. CDMA - III. Accessing mechanism for multiple transmitters over a single channel

         B. GSM - IV. It is cellular technology employs hybrid of FDMA and TDMA

         C. UMTS - I. It provides mobile internet connection with faster data transfer rates

         D. WiFi - II. It allows users to connect to a network or to other devices over wireless channel

The correct answer is : A – III, B – IV, C – I, D – II

Additional Information

• CDMA (Code Division Multiple Access): This cellular technology uses a spread spectrum technique, enabling multiple users to share a single frequency channel. Its primary purpose is to provide mobile voice and data services.
• GSM (Global System for Mobile Communications): GSM is a digital cellular technology that helps devices connect to the internet.
• UMTS (Universal Mobile Telecommunications System): This is a 3G cellular technology providing faster data transfer rates than GSM.
• Wi-Fi (Wireless Fidelity): Wi-Fi is a wireless networking technology that permits devices to connect to the internet or to each other over a short distance.