Wireless Networks Flashcards
802.11ac Standard
An IEEE standard for wireless network communications that replaced the older 802.11n standard. 802.11ac operates only in the 5 GHz frequency band with a maximum bandwidth of 3.5 Gbps.
802.11ax Standard
An IEEE standard for wireless network communication designed to replace the older 802.11ac standard. 802.11ax 0perates in both the 2.4 GHz and 5 GHz frequency bands and has a maximum bandwidth of 9.6 Gbps.
802.11n Standard
An IEEE standard for wireless network communications which was replaced by the 802.11ac standard. 802.11n operates in both the 2.4 GHz and 5 GHz frequency bands with a maximum bandwidth of 150 Mbps.
Autonomous Access Point (AP)
A type of wireless access point that is configured and controlled on an individual basis, rather than by a central controller. Autonomous APs do not work with or have knowledge of one another.
Basic Service Set (BSS) Coloring
A method for identifying signals for one SSID on a specific channel and distinguishing them from signals for a different SSID using the same channel. BSS color is a numerical identifier of a particular BSS.
Beamforming
A process that allows for the focusing of a wireless signal towards a specific client, rather than radiating out a wireless signal in all directions. Beamforming was first introduced in the 802.11n standard.
Control and Provisioning of Wireless Access Points (CAPWAP)
A modern protocol used by wireless LAN controllers (WLCs) to configure and control lightweight wireless access points. This was developed as a replacement for the legacy Lightweight Access Point Protocol (LWAPP).
Direct Sequence Spread Spectrum (DSSS)
A technique used by older wireless standards to increase the available wireless network speed, dividing the wireless spectrum into 22 MHz channels. A single stream of communication will occupy the entire 22 MHz channel.
Frequency Division Multiplexing (FDM)
An improvement to Direct Sequence Spread Spectrum (DSSS) where 20 MHz wireless channels are used, with those channels being divided into multiple subchannels to handle numerous communication flows.
Independent Basic Service Set (IBSS)
A direct wireless connection between devices where a file transfer takes place without the need of any wireless infrastructure. More commonly referred to as an ad hoc network.
Lightweight Access Point Protocol (LWAPP)
A legacy protocol used by wireless LAN controllers (WLCs) to configure and control lightweight wireless access points. This has been replaced by the modern Control and Provisioning of Wireless Access Points (CAPWAP) protocol.
Lightweight Access Points (APs)
A type of wireless access point that is configured and controlled via a central controller, known as a Wireless LAN Controller (WLC).
Link Aggregation (LAG)
A subset of the Link Aggregation Control Protocol (LACP) used for creating port channel interfaces for use between an ethernet switch and a wireless LAN controller.
Multi-User Multiple Input, Multiple Output (MU-MIMO)
A wireless technology created to increase the number of antennas on a wireless router that are both receiving and transmitting, improving wireless capacity.
Multiple Basic Service Set ID (MBSSID)
A feature of some wireless access points that allows you to offer multiple networks on the same hardware, such as separate corporate and guest wireless networks.
