What is the main disadvantage of a star network topology?

What is the main disadvantage of a star network topology?

• A. The entire network is affected by a single node failure
• B. A malfunctioning cable can disrupt the network
• C. The central computer failure makes the whole network unusable
• D. It is complicated to install

Answer: (C)

In a star network topology, all nodes are connected to a central hub or switch. The main disadvantage of this structure is that if the central hub or switch fails, the entire network goes down. This centralization means that the hub is a single point of failure; any issues with it render all connected devices unable to communicate with each other and with the outside world. In contrast, failures of individual nodes in a star topology do not affect the overall network operation—other nodes can still communicate through the hub. While a malfunctioning cable can indeed cause a disruption, it usually impacts only the specific connection rather than the whole network. The complexity of installation can vary depending on the size and scale of the network but is not inherently a limitation of the star topology itself. Therefore, the centrality of the hub and its impact on network functionality is what makes this choice the most accurate description of a significant disadvantage in this topology.

In a star network topology, all nodes are connected to a central hub or switch. The main disadvantage of this structure is that if the central hub or switch fails, the entire network goes down. This centralization means that the hub is a single point of failure; any issues with it render all connected devices unable to communicate with each other and with the outside world.

In contrast, failures of individual nodes in a star topology do not affect the overall network operation—other nodes can still communicate through the hub. While a malfunctioning cable can indeed cause a disruption, it usually impacts only the specific connection rather than the whole network. The complexity of installation can vary depending on the size and scale of the network but is not inherently a limitation of the star topology itself. Therefore, the centrality of the hub and its impact on network functionality is what makes this choice the most accurate description of a significant disadvantage in this topology.