Module06_-_deck_1

What is the main function of a Wi-Fi network interface card (NIC)?

To serve as a half-duplex radio transceiver that interfaces with the operating system and allows communication over Wi-Fi.

What are the common radio form factors for legacy external adapters?

PCMCIA, SD card, Compact Flash card, and USB.

What does the control plane consist of in WLAN architecture?

Control or signaling information, network intelligence, and protocols.

What is a key difference between autonomous and centralized WLAN architectures?

In autonomous architectures, the management, control, and data planes are at the edge; in centralized architectures, they are all located on the WLAN controller.

What does NMS stand for, and what is its purpose?

Network Management Server; it is used to centrally manage and monitor network devices.

By 2025, how many wirelessly connected IoT devices are estimated to exist worldwide?

53 billion units.

What types of wireless security can be used with VoWiFi?

WEP, WPA, and WPA2.

What is the significance of the management and control planes in WLAN?

The management plane is responsible for network management, while the control plane handles signaling and routing information.

What does the data plane do in a WLAN?

It forwards user traffic within the network.

What role do cloud services play in modern WLAN management?

They provide scalable management and monitoring under a Software as a Service (SaaS) model.

What type of device is commonly used for real-time location systems (RTLS)?

Wearable computing devices and Wi-Fi RFID tags.

What does VoWiFi stand for and why is it used?

Voice over Wi-Fi; it is used for voice communications over an 802.11 wireless LAN.

What is a WLAN bridge link used for?

To provide backhaul communications between buildings.

What is the projected growth of wearable devices from 2017 to 2025?

From 1 billion in 2017 to over 5 billion in 2025.

What protocol is often used for user traffic tunneling in WLAN controller architectures?

Generic Routing Encapsulation (GRE) or CAPWAP.

What frequency band do most IoT devices with 802.11 radio currently use for transmission?

The 2.4 GHz frequency band.

What are the two major types of client utilities?

Integrated operating system client utilities and third-party client utilities.

What is the significance of chipsets in WLAN technology?

They are groups of integrated circuits designed to work together, influencing the features and capabilities of network devices.

What do legacy devices lack compared to modern devices in terms of WLAN?

Support for 802.11k, r, v, and often only have 2.4 GHz radios.

What does 'mesh' refer to in WLAN architecture?

A network topology where user traffic can be routed through multiple access points, enhancing fault tolerance and reducing installation costs.

What can notification APIs in WLAN systems provide?

They offer a subscription service that alerts applications when specific events occur, like an AP going offline.