Optical Fiber Communications 4th Edition by Gerd Keiser

Exercise 2

Figure 13.59 shows two architectures in which switches share wavelength converters for cost-saving purposes. Find a set of wavelength connections that can be set up with the share- per-node architecture in Fig. 13.59 a but not with the share-per-link architecture in Fig. 13.59 b, and vice versa.
Fig. 13.59