Network Fundamentals - Wireless
What is an autonomous AP architecture?
An autonomous AP architecture is a network of APs that act and must be configured individually.
What are autonomous APs?
An autonomous AP is an individually configured AP that can act autonomously.
What is an outdoor bridge?
An outdoor bridge is a long-distance wireless connection between buildings or cities.
What is a QBSS?
A QoS Basic Service Set (QBSS) is a BSS that implements QoS
What is a WLC?
A wireless LAN controller (WLC) is a device that controls multiple LAPs.
What is a workgroup bridge?
A workgroup bridge is a wireless client of a BSS that allows ethernet connections.
What is the purpose of the BSSID in a Wi-Fi network?
The BSSID is used to identify the individual AP
What is a cloud-based AP architecture?
A cloud-based AP architecture is a network where APs retrieve their management functions and commands from the cloud rather than a WLC.
What is a distribution system?
A distribution system (DS) is the translational bridge between the LAN and the AP.
What is the control plane of a device?
A layer of a network device that is responsible for device management and forwarding management data.
What is a data plane of a device?
A layer of a network device that performs the actual operation over data flows, such as end-user traffic passing through the AP.
What is the BSA of a Wi-Fi network?
The Basic Service Area (BSA) is the physical area which the AP covers in the BSS.
What is the BSS of a Wi-Fi network?
The Basic Service Set (BSS) is the most common and basic type of Wi-Fi configuration consisting of an AP and clients connecting to it.
What is the BSSID of a Wi-Fi network based on?
The Basic Service Set ID (BSSID) is the MAC address of the AP in the BSS.
What does an ESS consist of?
ESSs consist of all the BSSs reporting back to a central WLC.
How does CAPWAP ensure each device is properly authenticated?
Every AP and WLC must authenticate with each other's digital certificates that is pre-installed on the device when it is purchased.
What is a Split-MAC architecture?
A Split-MAC architecture is the division of the control plane and the data plane between a WLC and a LAP.
Where are mesh networks usually utilized?
A mesh network is usually used in outdoor settings where difficult to run an Ethernet line for every AP.
What is a repeater?
A repeater is an AP that is set to listen to another AP with the same channel and frequency and forward their transmit packets to a greater distance.
What is an MBSS in a Wi-Fi network?
An Mesh Basic Service Set (MBSS) is multiple APs daisy chained together with one AP connected to the wired network.
Where are BSSs commonly found?
BSSs are commonly found in SOHO environments
What is the difference between CAPWAP control messages and data besides it's purpose?
CAPWAP control messages are encrypted and authenticated whereas CAPWAP data is not encrypted by default.
What are CAPWAP control messages?
CAPWAP control messages are packets containing commands that are used to configure the device and manage its operation.
What are CAPWAP data messages ?
CAPWAP data messages are packets travelling to and from wireless clients associated with the AP.
What is CAPWAP?
Control and Provisioning for Wireless Access Point (CAPWAP) is a protocol that provides authentication and a means of communication between APs and WLC.
What happens to the user data in a cloud-based AP architecture?
In a cloud-based AP architecture, the AP's user data still remains on the LAN and traverses the network as a normal packet from a switch would.
What are LAPs?
Lightweight Access Points (LAPs) are access points that cannot function on its own and requires a WLC.
What is the ESA of a Wi-Fi network?
The Extended Service Area (ESA) is the physical area which two or more combined APs cover in the ESS
What is the ESS of a Wi-Fi network?
The Extended Service Set (ESS) is the enterprise configuration of a Wi-Fi network
What is the ESSID of a Wi-Fi network based on?
The Extended Service Set ID (ESSID) is the logical SSID of the network.
What does an IBSS consist of?
The IBSS consists of two or more devices pairing to each other rather than AP.
What is an IBSS and what does it consist of?
The Independent Basic Service Set (IBSS) is the ad-hoc configuration of a Wi-Fi network.
In a split-MAC architecture, what does a LAP perform?
The LAP performs all the real-time computing such as encrypting packets and forwarding and receiving traffic
In a split-MAC architecture, what does a WLC perform?
The WLC performs all the management-based computing such as QoS, authentication, and security
What is the autonomous AP architecture also referred to as?
The autonomous AP architecture is also known as the local MAC architecture.
How does the WLC and the LAP become bound and what protocol do they use?
The two devices must form a tunnel between them in order to transfer data. They use the CAPWAP protocol in order to achieve this.
