PHYSICAL LAYER AND TRANSMISSION MEDIA
INTRODUCTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
True
|
|
|
False
|
|
|
Either A or B
|
|
|
None of the above
|
Detailed explanation-1: -Wireless LANs operate in full-duplex allowing all devices to send or receive data at the same time so the number of users does not impact performance. Explanation: The correct answer is False. WLANs operate in half-duplex, which means only one device can send or receive at a time.
Detailed explanation-2: -99.9% of the time Wireless is half duplex. There are experiments that can result in a “full duplex” wireless network but that’s all lab-based and not real-world. With Wireless the devices cannot send and receive simultaneously and they cannot sense collisions.
Detailed explanation-3: -Network Media Standard IEEE 802.15: Wireless Personal Area Network (WPAN) standard, commonly known as “Bluetooth", uses a device pairing process to communicate over distances from 1 to 100 meters.
Detailed explanation-4: -The same connection supports both transmitting and receiving but only one at a time. For example, while a computer is sending data over the connection, it cannot receive data on the same connection.