IGCSE DataTransmission_Hardware

What is the typical size of a data packet?

• 16 KiB

• 32 KiB

• 64 KiB

• 128 KiB

Which part of a packet contains error-checking information?

• Header

• Payload

• Trailer

• Router

What information is stored in the packet header?

• Payload only

• Error code

• IP addresses

• Parity bits

Which transmission mode allows data in one direction only?

• Half-duplex

• Full-duplex

• Simplex

• Parallel

Full-duplex transmission allows:

• Data one way only

• Both ways, one at a time

• Both ways simultaneously

• Data via packets only

Serial transmission sends data:

• 8 bits at a time

• 1 bit at a time

• 4 bits at a time

• Parallel channels

Parallel transmission is best suited for:

• Long distances

• Short distances

• Wireless networks

• Encrypted links

Data arriving out of synchronisation in parallel lines is called:

• Lag

• Error rate

• Skew

• Latency

The Universal Serial Bus (USB) uses:

• Parallel transmission

• Serial transmission

• Wireless transmission

• Optical signals

USB connections can be:

• Half-duplex only

• Full-duplex only

• Half or Full-duplex

• Simplex only