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Question 1 of 20

1. Question
What does “NTN” stand for?
- New Terrestrial Network
- Non-Terrestrial Network
- National Telecom Node
- Next Transmission Network
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Question 2 of 20

2. Question
Which of these is a satellite constellation operated by SpaceX?
- OneWeb
- Amazon Leo
- Starlink
- Globalstar
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Question 3 of 20

3. Question
Why is a satellite dish NOT needed for Direct-to-Cell (D2C)?
- The satellite is geostationary
- It is designed to reach an ordinary phone directly
- The phone has a hidden dish
- Dishes are illegal
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Question 4 of 20

4. Question
Which company powers Apple’s iPhone Emergency SOS via satellite?
- Globalstar
- Starlink
- Amazon Leo
- Telesat
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Question 5 of 20

5. Question
Which service does today’s D2C mainly provide?
- 4K video streaming
- Online gaming
- Messaging and emergency alerts
- Fibre-speed broadband
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Question 6 of 20

6. Question
A constellation is :
- A single large satellite
- A group of satellites working together as one system
- A ground station
- A type of antenna
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Question 7 of 20

7. Question
Is Globalstar a GEO or LEO operator?
- GEO, at ~35,786 km
- LEO, at ~1,414 km
- MEO, at ~8,000 km
- It owns no satellites
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Question 8 of 20

8. Question
How is Amazon obtaining D2D capability?
- Buying spectrum from EchoStar
- Buying the operator Globalstar
- Partnering with AST
- Using unlicensed spectrum
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Question 9 of 20

9. Question
What is special about Skylo compared with other D2D players?
- It owns the most satellites
- It owns NO satellites it leases GEO capacity
- It only serves the US
- It uses mmWave
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Question 10 of 20

10. Question
The 3GPP band n256 (MSS S-band, ~2 GHz) is:
- The same as n25
- A millimetre-wave (mmWave) band
- A Wi-Fi band
- An FR1 sub-6 GHz NTN band
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Question 11 of 20

11. Question
In the regenerative NTN architecture (Release 19), the base station is:
- On the ground next to the gateway
- On board the satellite
- In the user’s phone
- Not needed at all
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Question 12 of 20

12. Question
Why does full voice + broadband D2D need NEW chipsets from ~2027?
- Phones must support the MSS bands (n252/n256)
- Old phones are banned by law
- Satellites physically reject old phones
- 5G is illegal on old phones
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Question 13 of 20

13. Question
What is the study’s decisive limitation for D2C as a mass service?
- Satellites are too expensive
- Phones have no GPS
- 70–80% of mobile traffic is indoors, but D2C works outdoors
- It only works at night
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Question 14 of 20

14. Question
How did SpaceX obtain MSS spectrum for future D2D?
- Built its own from scratch
- Bought the operator Globalstar
- Leased it from T-Mobile
- Bought spectrum licences from EchoStar
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Question 15 of 20

15. Question
Today’s live Starlink + T-Mobile D2C service runs on which kind of spectrum?
- Its own MSS S-band
- The operator’s IMT / LTE band (n25)
- FSS Ka band
- Unlicensed Wi-Fi
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Question 16 of 20

16. Question
Eutelsat OneWeb’s business model is mainly:
- B2B wholesale through partners
- Consumer retail like Starlink
- Military only
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Question 17 of 20

17. Question
A device using IoT-NTN needs:
- Any ordinary phone, no change
- An NTN-capable chip (NB-IoT / LTE-M NTN)
- A satellite dish
- A 6G modem
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Question 18 of 20

18. Question
In the Starlink D2C capacity study, what mainly limits per-cell downlink to ~2.5 Mbps?
- Self-interference between the satellite’s own beams
- Weak satellite battery
- Cloud cover
- Phone screen size
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Question 19 of 20

19. Question
Broadband satellite service (e.g. Starlink dish) typically uses which spectrum?
- FSS Ka/Ku band (above ~12 GHz)
- MSS L-band
- IMT band n25
- AM radio band
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Question 20 of 20

20. Question
In the transparent NTN architecture (Release 17), the satellite acts as:
- A simple relay / “bent pipe”
- A full base station in orbit
- A core network node
- A GPS beacon
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