Communication & Multiplexing Quiz

To prevent signal overlap in FDM, we use:

• Switches

• Guard bands

• Time slots

• Multiplexers

For three 4kHz voice channels without guard bands, minimum required bandwidth is:

• 8 kHz

• 14 kHz

• 16 kHz

• 12 kHz

Five 100-kHz channels with 20kHz guard bands require minimum bandwidth of:

• 560 kHz

• 520 kHz

• 580 kHz

• 600 kHz

WDM is specifically designed for:

• Copper cables

• Coaxial cables

• Fiber-optic cables

• Satellite links

The key advantage of fiber-optic cable in WDM is its:

• Ease of installation

• Low cost

• Durability

• High-data-rate capability

In WDM, multiplexing/demultiplexing is commonly done using:

• Oscillators

• Repeaters

• Switches

• Prisms

WDM combines multiple:

• Digital signals

• Electric signals

• Audio signals

• Optical signals

TDM is fundamentally a:

• Digital multiplexing technique

• Analog modulation method

• Noise cancellation technique

• Carrier filtering method

In TDM, multiple connections share the link by dividing:

• Phase

• Frequency

• Time

• Power

Synchronous TDM allocates time slots to input connections:

• Based on priority

• Only when data is present

• Even when idle

• Randomly