6.3 Flashcards
The wave encounters an obstacle and reflects or bounces back towards its source a wireless signal will bounce off objects who surface dimensions are large compared with the signals average wavelength this is known as
Reflection
When a wireless signal encounters an object that has small surface dimensions compared with the signals wave links its diffused or scattered in multiple directions. This is also related to the roughness of the surface a wireless signals and counters. It’s known as
Scattering
A wireless signal is diffracting or split into secondary waves when it encounters an obstruction the secondary wave continues to propagate generally in the direction from which they were split this is known as
Diffraction
This is a collection of wireless standards and their in men’s extensions corrections developed by IEEE 802.11 committee
Wi-Fi or why Fidelity
Notable wireless standers developed by IEEE 802.11 committee annex test groups are 802.11BAGN/AC/AX
A B G N AC AX
802.11 standards employ various technologies as a physical layer and later standards modify the way frames are used at the —- layer
Mac
This Wi-Fi standard uses frequency 2.4 GHz at 11 MB a second the fact of range of 100 m
802.11 B
This wireless standard operates at 5 GHz at 54 MB a second what is effective range of 50 m
802.11 A
This Wi-Fi standard operates at 2.4 GHz at 54 MB a second with an effective range of 100 m
802.11 G
This wireless standard operates at 2.4 and 5 GHz with 600 MB a second and effective range of 70 m indoors and 250 m outdoors
802.11 N
This wireless standard operates at 5 GHz with an affective range of 70 indoors And 250 m outdoors operating in speed in three different waves and three variable speeds
802.11ac
This kid operate at 2.4 to 5 GHz or at 6 GHz with Wi-Fi 6E it has a top speed of 9.6 GB per second and effective range of 70 m indoors and 250 m outdoors
802.11 AX
Starting with this wireless standard two adjacent 20 MHz channels can be combined to make a 40 MHz channel. This more than doubles the band was available to a single 20 MHz channel and it’s More suited for 5 GHz banned because it has more channels is less crowded
802.11N
First developed with this wireless standards multiple antennas on the access points and on a client device process incoming and outgoing data simultaneously this is known as
Multi and multi out
This is related to multi and multi out in an even newer technology implemented by 802.11 AC wave two and newer products that allow multiple Montana’s to serve service multiple clients simultaneously this is known as
Multiuser multi and multi out
