正解:C
Explanation
Hub-and-spoke is a network topology where each node connects to a central switching device, such as a hub or a switch. All traffic between the nodes must pass through the central device, which acts as a single point of communication and control. Hub-and-spoke topology is simple, easy to manage, and cost-effective, but it also has drawbacks, such as low redundancy, high latency, and scalability issues.
References:
Network Topologies - N10-008 CompTIA Network+ : 1.21
CompTIA Network+ Certification Exam Objectives, page 92