Lan Questions: MCQ Quiz!

A Wireless Distribution System allows the connection of multiple access points together. It is used to expand a wireless network to a larger network.

WEP stands for Wired Equivalent Privacy, which is a security algorithm specifically designed for wireless networks. It was developed to provide a level of security for wireless communications that is comparable to that of a wired network. WEP encrypts data transmitted over a wireless network to protect it from unauthorized access or interception. However, it is important to note that WEP is considered to be weak and vulnerable to various security attacks, and it has been largely replaced by more secure encryption protocols such as WPA and WPA2.

Access point in a wireless network is any device that will allow the wireless devices to a wired network. A router is the best example of an Access Point.

An ad-hoc wireless network is a decentralized kind of a wireless network. An access point is usually a central device, and it would go against the rules of the ad-hoc network to use one. Hence it is not required.

SMA/CA stands for Carrier-sense multiple access/collision avoidance. It is a multiple-access protocol used by IEEE 802.11 standard for wireless LAN. It’s based on the principle of collision avoidance by using different algorithms to avoid collisions between channels.

The extended service set is a part of the IEEE 802.11 WLAN architecture and is used to expand the range of the basic service set by allowing connection of multiple basic service sets.

OFDM (Orthogonal Frequency Division Multiplexing) is actually widely used in wireless LAN (Local Area Network) systems. It is a modulation technique that divides the available frequency spectrum into multiple subcarriers, allowing for efficient data transmission and increased resistance to interference. OFDM is used in various wireless LAN standards such as Wi-Fi (802.11a/g/n/ac/ax) to provide high data rates and improved performance in crowded environments. Therefore, the given statement is incorrect, and the correct answer is False.

The infrastructure components of a wireless network, such as access points and routers, are typically interconnected by switches. Switches are networking devices that allow multiple devices to connect and communicate with each other within a local area network (LAN). They provide a central point for all the devices to exchange data and manage the flow of information. In the context of a wireless network, switches play a crucial role in connecting the wired components, like access points, to the rest of the network infrastructure. This enables the wireless network to function efficiently and ensures seamless communication between the various components.

A WLAN access point covers between 802.11 and 802.3 frames.