Answer:
The characteristics of a Basic Service Set (BSS) WLAN system are:
A) is used if no WLAN Access Point is available and data needs to be exchanged between two or more devices
B) Data are not exchanged directly between client devices
D) access point usually also acts as a bridge to a fixed line network
Therefore, the correct options are A, B, and D.
Step-by-step explanation:
A Basic Service Set (BSS) is a collection of one or more wireless devices that communicate directly with each other. Some characteristics of a BSS WLAN system include:
A) is used if no WLAN Access Point is available and data needs to be exchanged between two or more devices: This is true. A BSS WLAN system can be used when there is no WLAN Access Point (WAP) available to connect devices to a wireless network. In this case, devices can communicate directly with each other in the BSS.
B) Data are not exchanged directly between client devices: This is false. In a BSS WLAN system, data is exchanged directly between client devices without the need for a WAP.
C) No central point in the network: This is partially true. While there is no central WAP in a BSS, there is still one device that acts as the "master" or "primary" device, called the BSS Station (BSSS). The BSSS is responsible for managing the network and coordinating communication between devices.
D) access point usually also acts as a bridge to a fixed line network: This is false. In a BSS WLAN system, there is no WAP, so there is no device acting as a bridge to a fixed line network.
E) devices exchange their data directly with each other: This is true. In a BSS WLAN system, devices communicate directly with each other without the need for a WAP.