CISSP Question #1453: Real Exam Question with Answer & Explanation

Question

When telephones in a city are connected by a single exchange, the caller can only connect with the switchboard operator. The operator then manually connects the call. This is an example of which type of network topology?

Options

• AStar
• BTree
• CPoint-to-Point Protocol (PPP)
• DBus

Explanation

The type of network topology that is exemplified by the scenario where telephones in a city are connected by a single exchange, and the caller can only connect with the switchboard operator, who then manually connects the call, is the star topology. A star topology is a type of network topology that consists of a central node, such as a switch, a hub, or a router, that connects to multiple peripheral nodes, such as computers, printers, or phones, using point-to-point links. A star topology allows the communication between the peripheral nodes to be controlled and routed by the central node, which can provide better performance, reliability, and security. A star topology also simplifies the network design, management, and troubleshooting, as the failure or addition of a peripheral node does not affect the rest of the network. A star topology is suitable for the scenario where telephones in a city are connected by a single exchange, and the caller can only connect with the switchboard operator, who then manually connects the call, as it can enable the centralized and efficient communication between the telephones.

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