11. A network is set up with a single communication line where all devices share the same transmission medium. Which topology does this describe?

Answer: D

Explanation:

Bus topology describes a network set up with a single communication line where all devices share the same transmission medium.

In a bus topology, all devices are connected to a single central cable, known as the bus, through which data is transmitted. This allows all devices to communicate over the same medium.

A) Star

Star topology involves all devices connected to a central hub or switch, which manages communication between them. This structure does not fit the description of a single communication line shared by all devices.

B) Tree

Tree topology is a combination of star and bus topologies, with a hierarchical structure. It also cannot be described as having a single communication line shared by all devices, as it requires multiple branches and connections.

C) Hybrid

Hybrid topology combines different types of topologies, such as star and bus. While it can include a bus segment, it does not accurately represent a network exclusively using a single communication line shared by all devices.

D) Bus

Bus topology is characterized by a single communication line to which all devices are connected, allowing them to share the same transmission medium. This matches the description provided in the question perfectly.

Conclusion

Bus topology is definitively the correct answer as it directly aligns with the description of a network using a single communication line shared by all devices. The other options fail to meet this criterion, as they involve multiple connections or a different structural setup.