In fiber optics it is essential to have: 1. Only Error detection 2. Both Error detection and correction 3. Only Error correction 4. None of the above; In Wireless transmission it i... In fiber optics it is essential to have: 1. Only Error detection 2. Both Error detection and correction 3. Only Error correction 4. None of the above; In Wireless transmission it is essential to have: 1. Only Error detection 2. Only Error correction 3. Both Error detection and correction 4. None of the above; The device that converts a digital signal to analog and vice versa is called: 1. DSL 2. ADSL 3. MODem 4. Multiplexer; One of the following does NOT apply to microwave signals: 1. Waves travel in nearly straight lines 2. They do not penetrate buildings 3. Are not affected by the atmosphere 4. At 4GHz water absorbs wave; If a protocol at layer (n) is changed and needs to add internal information for its use, it must inform: 1. Layer (n+1) 2. Layer (n-1) 3. Both layers (n+1) & (n-1) 4. None of them; In Wireless transmission: the organization responsible for allocating radio frequencies is: 1. IEEE 2. ANSI 3. ISO 4. ITU.
Understand the Problem
The question involves identifying the correct answers to a series of technical questions related to fiber optics, wireless transmission, and microwave signals. It requires knowledge in telecommunications and networking concepts.
Answer
Fiber optics: Both error detection and correction. Wireless: Both error detection and correction. Modem. Not affected by atmosphere. Inform both layers. ITU.
In fiber optics, it is essential to have both error detection and correction. In wireless transmission, it is essential to have both error detection and correction. The device that converts a digital signal to analog and vice versa is called a modem. Microwave signals are not affected by the atmosphere. If a protocol at layer (n) is changed, it must inform both layers (n+1) and (n-1). The organization responsible for allocating radio frequencies in wireless transmission is the ITU.
Answer for screen readers
In fiber optics, it is essential to have both error detection and correction. In wireless transmission, it is essential to have both error detection and correction. The device that converts a digital signal to analog and vice versa is called a modem. Microwave signals are not affected by the atmosphere. If a protocol at layer (n) is changed, it must inform both layers (n+1) and (n-1). The organization responsible for allocating radio frequencies in wireless transmission is the ITU.
More Information
Forward error correction is widely used in fiber optics to ensure data integrity over long distances. Modems convert digital signals for transmission over analog channels. Microwave signals can be absorbed by atmospheric conditions. ITU manages global radio frequency allocation.
Tips
A common mistake is confusing error detection with error correction—they are distinct processes. Error detection identifies errors, while error correction fixes them.
Sources
- Forward Error Correction (FEC): A Primer - cablelabs.com
- What is forward error correction (FEC)? - techtarget.com
- Fiber Optics and Types - GeeksforGeeks - geeksforgeeks.org
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