Q: Which of these allows connections from many devices and inspects the contents of ethernet protocol data?
or
Q: Which of these inspects the contents of the ethernet protocol data and permits connections from multiple devices?
- A cable
- A hub
- A switch
- A collision domain
Explanation: It is presumably a switch that permits connections to be made from a variety of devices and examines the contents of data sent via the Ethernet protocol. Switches are responsible for the forwarding of Ethernet packets based on the MAC addresses of the devices they are connected to and function at the Data Link layer (Layer 2) of the OSI model. In contrast to hubs, which send data to all of the devices that are connected to them, switches selectively advance frames just to the device that the frame was meant for. Some more sophisticated switches additionally can examine and filter traffic depending on the contents of the Ethernet frames. This feature is found in some of those switches.
