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Which of these technologies requires line of sight for communication?
1. bluetooth
2. wi-fi
3. near field communication
Select the correct answer using the codes given below.
  • a)
    1 and 2 only
  • b)
    3 only
  • c)
    1 and 3 only
  • d)
    None
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Which of these technologies requires line of sight for communication?1...
An example of line of sight communication is the TV remote. Bluetooth & Wi-Fi does not require line of sight. Near Field Communication (NFC) is a set of short-range wireless technologies, typically requiring a distance of 4cm or less to initiate a connection. NFC does not require line of sight. 
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Most Upvoted Answer
Which of these technologies requires line of sight for communication?1...
Line of sight refers to the unobstructed view between two communicating devices. In other words, it means that there should not be any physical barriers, such as walls or objects, between the devices for effective communication. Based on this definition, let's analyze the given technologies to determine which ones require line of sight for communication:

1. Bluetooth:
- Bluetooth technology does not require line of sight for communication.
- It uses radio waves to establish a wireless connection between devices.
- Bluetooth signals can pass through objects like walls or furniture, allowing communication between devices even when they are not in direct line of sight.

2. Wi-Fi:
- Wi-Fi technology also does not require line of sight for communication.
- It uses radio waves to transmit data between devices and access points.
- Wi-Fi signals can penetrate walls and other obstacles, enabling communication between devices in different rooms or floors.

3. Near Field Communication (NFC):
- NFC technology does require line of sight for communication.
- It is a short-range wireless communication technology that allows devices to exchange data when they are in close proximity (within a few centimeters).
- NFC relies on electromagnetic induction to establish a connection, and the devices need to be brought close together for effective communication.
- If there are physical barriers between the devices, such as walls or objects, the NFC signals may be obstructed, resulting in communication failure.

Based on the above analysis, the correct answer is option 'D' - None of the given technologies (Bluetooth, Wi-Fi, NFC) require line of sight for communication.
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Which of these technologies requires line of sight for communication?1. bluetooth2. wi-fi3. near field communicationSelect the correct answer using the codes given below.a)1 and 2 onlyb)3 onlyc)1 and 3 onlyd)NoneCorrect answer is option 'D'. Can you explain this answer?
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