Wireless Theory
Units of dB compare signal power using this scale
What is logarithmic
This type of AP, unlike autonomous APs, requires a WLC in order to function
What is a lightweight AP
This is the most efficient type of roaming
What is intracontroller roaming
This WPA authentication mode is also known as personal mode
What is PSK or pre-shared key
This is the first step to take when a user complains of wireless issues
What is gather more information
The unit dBm is an abbreviation for this measurement
What is decibel-milliwatts
This WLC/AP deployment model consists of a remote AP maintaining a control CAPWAP tunnel to a centralized WLC, while forwarding data without CAPWAP tunnel
What is FlexConnect
This element is responsible the decision for a device to roam from one AP to another
What is the client device itself
This WPA version strengthens personal mode authentication using Simultaneous Authentication of Equals (SAE)
What is WPA3
This piece of information is the most helpful in locating a client in the WLC GUI for troubleshooting
What is the MAC address
These channel widths are supported by 802.11ax
What are 20, 40, 80, & 160 MHz
This occurs if an AP is unable to discover a WLC after exhausting all methods
What is reboots and restarts discovery process
This is the term for the origin WLC in a Layer 3 roam
What is the anchor controller
Open Authentication can be used in combination with type of authentication method
What is WebAuth
The higher this measure of signal quality, the higher the likelihood of good client performance and higher data rates
What is SNR or signal-to-noise ratio.
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802.11ax introduced this method to divide channels into subcarriers to schedule and control access to the wireless medium
What is OFDMA or orthogonal frequency division multiplexing access
These three tags are mapped to each AP via an IOS XE WLC
What are site, RF, & policy?
This can be used by a group of APs to triangulate the location of a wireless device
What is RSS or Received Signal Strength
This is the role of a WLC configured to use an external RADIUS server for 802.1X
What is authenticator
This tab in the WLC provides an overview of an individual AP's data such as location, model, serial number, etc. which can assist with general AP connectivity troubleshooting
What is 360 View
QAM alters these two aspects of an RF signal
What are amplitude and phase
This type of antenna has the highest gain of all wireless LAN antennas
What is a parabolic dish antenna
These constructs organize WLCs to facilitate intercontroller roaming
What are mobility groups
EAPOL leverages a handshake with this many steps
What is a four-way handshake
This troubleshooting method on the WLC collects logs on a list of MAC addresses and outputs it into a debug file
What is a radioactive trace