Wireless Standards Flashcards
What are the two primary frequency bands used in wireless networks?
2.4 GHz and 5 GHz.
What is the maximum theoretical speed of 802.11a?
54 Mbps.
What frequency does 802.11a operate on?
5 GHz.
What is the maximum theoretical speed of 802.11b?
11 Mbps.
What frequency does 802.11b operate on?
2.4 GHz.
What is the maximum theoretical speed of 802.11g?
54 Mbps.
What frequency does 802.11g operate on?
2.4 GHz.
What is the maximum theoretical speed of 802.11n?
600 Mbps with multiple streams.
What frequencies does 802.11n operate on?
2.4 GHz and 5 GHz.
What is the maximum theoretical speed of 802.11ac?
Up to 6.77 Gbps.
What frequency does 802.11ac operate on?
5 GHz.
What is the maximum theoretical speed of 802.11ax (Wi-Fi 6)?
Up to 9.6 Gbps.
What frequencies does 802.11ax operate on?
2.4 GHz and 5 GHz.
What is the range of 2.4 GHz Wi-Fi indoors?
Approximately 100-150 feet.
What is the range of 5 GHz Wi-Fi indoors?
Approximately 50-75 feet.
How many non-overlapping channels are available on the 2.4 GHz band?
3 (channels 1, 6, and 11).
How many non-overlapping channels are available on the 5 GHz band?
Up to 24, depending on the country.
What is the purpose of channel bonding in Wi-Fi?
To combine two channels for increased bandwidth.
What is MIMO in wireless networking?
Multiple Input Multiple Output, a technology that uses multiple antennas for data streams.
What is MU-MIMO?
Multi-User MIMO, which allows multiple devices to communicate simultaneously with the router.
What is beamforming in wireless networking?
A technology that focuses Wi-Fi signals toward specific devices for improved performance.
What is the maximum range of long-range fixed wireless systems?
Up to 40 miles with line of sight.
What is the purpose of a wireless repeater?
To extend the range of a wireless network.
What is the function of a wireless bridge?
To connect two separate networks over a wireless link.
What is the purpose of a wireless access point (WAP)?
To allow wireless devices to connect to a wired network.
What is the purpose of Wi-Fi Protected Access (WPA/WPA2)?
To secure wireless networks using encryption.
What encryption protocol does WPA2 use?
AES (Advanced Encryption Standard).
What is the benefit of Wi-Fi 6 (802.11ax)?
Improved efficiency, higher capacity, and better performance in dense environments.
What is the difference between 802.11ac and 802.11ax?
802.11ax (Wi-Fi 6) supports both 2.4 GHz and 5 GHz, while 802.11ac is 5 GHz only.
What is the purpose of DFS (Dynamic Frequency Selection) channels?
To avoid interference with radar systems in the 5 GHz band.
What is the purpose of SSID in wireless networks?
To identify the network name for devices to connect to.
What is the maximum number of streams supported by 802.11n?
4 spatial streams.
What is the maximum number of streams supported by 802.11ac?
8 spatial streams.
What is the purpose of an omnidirectional antenna?
To broadcast Wi-Fi signals in all directions.
What is the purpose of a directional antenna?
To focus Wi-Fi signals in a specific direction for greater range.
What is the purpose of wireless site surveys?
To determine the optimal placement of access points for coverage.
What is the purpose of a mesh Wi-Fi system?
To provide seamless coverage by connecting multiple nodes.
What is the purpose of 802.11r?
Fast roaming between access points for mobile devices.
What is the purpose of 802.11k?
To improve client roaming and network performance.
What is the purpose of 802.11v?
To optimize network resources and client device connectivity.
What is the purpose of Wi-Fi Direct?
To allow peer-to-peer connections without a router.
What is the maximum channel width for 802.11n?
40 MHz.
What is the maximum channel width for 802.11ac?
160 MHz.
What is the purpose of WPA3?
To provide stronger encryption and security for Wi-Fi networks.
What is the difference between WPA2 and WPA3?
WPA3 uses more robust encryption and forward secrecy.
What is the purpose of a captive portal?
To require authentication or agreement before accessing a Wi-Fi network.
What is the purpose of a hotspot?
To provide internet access to devices via a Wi-Fi connection.
What is the purpose of an SSID broadcast?
To make the wireless network visible to devices.
What is Wi-Fi 6E?
An extension of Wi-Fi 6 that operates on the 6 GHz band for less interference.
