IT2006 Quiz

In which transmission mode can data flow in both directions simultaneously?

• Simplex transmission

• Half-duplex transmission

• Full-duplex transmission

• Serial data transmission

Which transmission method is used to transmit large blocks of data at a time?

• Asynchronous transmission

• Synchronous transmission

• Parallel data transmission

• Serial data transmission

Which transmission media requires physical links between devices?

• Twisted Pair

• Coaxial Cable

• Optical Fiber

• Unguided media

Which transmission media can penetrate through buildings and does not require alignment of antennas?

• Radio waves

• Microwaves

• Infrared

• Optical Fiber

What is the function of an antenna?

• To catch radio waves and turn them into electrical signals

• To transmit and receive wavelengths of signals

• To guide a traveling wave

• To broadcast signals between locations

Which frequency range is designated as Extremely Low Frequency (ELF)?

• 3 KHz to 30 KHz

• 30 MHz to 300 MHz

• 300 KHz to 3000 KHz

• 3 MHz to 30 MHz

Which wave propagation method uses the ionosphere for propagation?

• Ground Wave

• Sky Wave

• Space Wave

• Multiplexing

What is the purpose of multiplexing in a network?

• To dedicate a connection for each pair of devices

• To make a scarce or expensive resource stretch further

• To prevent collisions in media access

• To increase the utilization of media

Which media access method uses carrier sense and collision detection?

• CSMA/CD

• CSMA/CA

• Token passing

• Demand priority

What is the purpose of carrier sense in CSMA/CD?

• To signal intention to transmit before transmitting

• To detect and react to collisions

• To prevent collisions by using tokens

• To divide transmission time into non-overlapping time slots