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Optical Networks



          282  Chapter Seventeen
























































                      Figure 17.1. Examples of broad categories of networks
                      ranging from LANs to WANs.



          17.1.1. Types of networks
                      Networks can be divided into the following broad categories, as Fig. 17.1 illustrates:
                        1. Local-area networks (LANs) interconnect users in a localized area such
                          as a room, a department, a building, an office or factory complex, or a


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