A FDM-based network is a circuit-switched network

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BlackTom AI · Accepted Answer

The question under consideration is: 'A FDM-based network is a circuit-switched network'.

First, distinguish the two concepts involved:
- FDM (Frequency-Division Multiplexing) is a multiplexing technique that partitions a communications channel into multiple frequency bands, allowing simultaneous transmission of multiple signals over the same physical medium.
- Circuit switching is a network service/architecture where a dedicated communication path is established between sender and receiver for the duration of a communication session.

With that in mind, assess the claim. An FDM-based network describes how signals are multiplexed across frequencies, not how the connection is established or sustained. Therefore, FDM by itself does not imply that a circuit-switched paradigm is in use. It is entirely feasible for an FDM framework to be used within a circuit-switched context (for example, a traditional landline system that dedicates certain frequency bands for a circuit) or within a packet-switched context (where the spectrum could be shared in a different way and channels are not permanently reserved).

In other words, saying that an FDM-based network is a circuit-switched network conflates the multiplexing technique with the switching architecture. The correct understanding is that FDM pertains to spectral allocation, while circuit switching pertains to how paths are established and maintained. The combination of an FDM approach with circuit switching is possible, but FDM does not by necessity or by definition entail circuit switching.

Given there are no alternate options presented here to evaluate, we cannot compare multiple choices. However, the core misconception to highlight is equating a multiplexing method (FDM) with a specific switching paradigm (circuit switching).

INTRO TO COMPUTER NETWORKS (CS_372_400_U2025) Module 1 Summary Exercises

A FDM-based network is a circuit-switched network

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