Question

Which of the following statements about communication protocols are true? (select 2):

A. Multi-drop and multi-point are the same thing, but one is American and the other is European nomenclature.
B. In a multilayer network, peers in one layer can listen but cannot talk directly to the peers in other layers.
C. In master-slave networks, the master can listen to only one slave at a time.
D. In master-slave multi-drop networks, all slaves can listen to the master at the same time.
E. In SPI networks, the number of devices that can be included is only limited by the length of the wires and the physical space in the board.

Answer 1

The true statements about communication protocols are that in a multilayer network, peers in one layer cannot talk directly to peers in other layers, and in a master-slave multi-drop network, all slaves can listen to the master simultaneously.

Step-by-step explanation:

Among the statements about communication protocols, the ones that are true are:

• B. In a multilayer network, peers in one layer can listen but cannot talk directly to the peers in other layers.
• D. In master-slave multi-drop networks, all slaves can listen to the master at the same time.

Statement A is incorrect because multi-drop and multi-point are terms often used interchangeably in communication systems to describe network configurations where multiple devices are connected to a common communication line.

Statement C is incorrect because in a master-slave network, the master may communicate with multiple slaves sequentially, not necessarily being restricted to one at a time.

Statement E is incorrect because in SPI networks (Serial Peripheral Interface), the number of devices is limited also by the number of select lines available on the master device, not just by the wire length and physical space.