Question 9590 – P-NP
November 7, 2023Computer-Networks
November 7, 2023Computer-Networks
| Question 776 |
Which multiple access technique is used by IEEE 802.11 standard for wireless LAN?
| CDMA | |
| CSMA/CA
| |
| ALOHA | |
| None of the Options |
Question 776 Explanation:
A wireless LAN system allows a station using infrared, visible light, or radio wave to communicate with similarly configured stations in the vicinity, or to communicate with remote stations via a nearby base station that is connected to a wired network. The most prevalent wireless LANs used today are those based IEEE 802.11. These standards use similar medium access control protocol and frame format as the Ethernet, and therefore IEEE 802.11 – based wireless LANs have been referred to as wireless Ethernets.
A wireless LAN can be characterized by the following attributes
Architecture
Physical layer
Medium access control layer
Architecture
Based on IEEE 802.11 standards, wireless LANs can be classified as follows: infrastructure and ad hoc. With the ad hoc architecture, wireless stations communicate directly with each other on an ad hoc basis.
Physical Layer
The physical layer is characterized by the following three elements: the frequency band, the multiple access method (which are similar to “multiplexing” in the wired environment, and the data rate.
Medium Access Control (MAC) Layer
This layer provide the same function as the MAC layer in the wired LAN environment.
IEEE 802.11, instead of using Ethernet’s CSMA/CD, specifies a scheme called CSMA/CA.
CA stands for Collision Avoidance. (In the wireless environment, since a station may not be able to hear all other stations, CD, Collision Detection is not feasible)
A wireless LAN can be characterized by the following attributes
Architecture
Physical layer
Medium access control layer
Architecture
Based on IEEE 802.11 standards, wireless LANs can be classified as follows: infrastructure and ad hoc. With the ad hoc architecture, wireless stations communicate directly with each other on an ad hoc basis.
Physical Layer
The physical layer is characterized by the following three elements: the frequency band, the multiple access method (which are similar to “multiplexing” in the wired environment, and the data rate.
Medium Access Control (MAC) Layer
This layer provide the same function as the MAC layer in the wired LAN environment.
IEEE 802.11, instead of using Ethernet’s CSMA/CD, specifies a scheme called CSMA/CA.
CA stands for Collision Avoidance. (In the wireless environment, since a station may not be able to hear all other stations, CD, Collision Detection is not feasible)
Correct Answer: B
Question 776 Explanation:
A wireless LAN system allows a station using infrared, visible light, or radio wave to communicate with similarly configured stations in the vicinity, or to communicate with remote stations via a nearby base station that is connected to a wired network. The most prevalent wireless LANs used today are those based IEEE 802.11. These standards use similar medium access control protocol and frame format as the Ethernet, and therefore IEEE 802.11 – based wireless LANs have been referred to as wireless Ethernets.
A wireless LAN can be characterized by the following attributes
Architecture
Physical layer
Medium access control layer
Architecture
Based on IEEE 802.11 standards, wireless LANs can be classified as follows: infrastructure and ad hoc. With the ad hoc architecture, wireless stations communicate directly with each other on an ad hoc basis.
Physical Layer
The physical layer is characterized by the following three elements: the frequency band, the multiple access method (which are similar to “multiplexing” in the wired environment, and the data rate.
Medium Access Control (MAC) Layer
This layer provide the same function as the MAC layer in the wired LAN environment.
IEEE 802.11, instead of using Ethernet’s CSMA/CD, specifies a scheme called CSMA/CA.
CA stands for Collision Avoidance. (In the wireless environment, since a station may not be able to hear all other stations, CD, Collision Detection is not feasible)
A wireless LAN can be characterized by the following attributes
Architecture
Physical layer
Medium access control layer
Architecture
Based on IEEE 802.11 standards, wireless LANs can be classified as follows: infrastructure and ad hoc. With the ad hoc architecture, wireless stations communicate directly with each other on an ad hoc basis.
Physical Layer
The physical layer is characterized by the following three elements: the frequency band, the multiple access method (which are similar to “multiplexing” in the wired environment, and the data rate.
Medium Access Control (MAC) Layer
This layer provide the same function as the MAC layer in the wired LAN environment.
IEEE 802.11, instead of using Ethernet’s CSMA/CD, specifies a scheme called CSMA/CA.
CA stands for Collision Avoidance. (In the wireless environment, since a station may not be able to hear all other stations, CD, Collision Detection is not feasible)