Weve already investigated the kinds of cable youre likely to find connecting the devices in a network environment. In this chapter, we will survey the types of network devices that can take part in a LAN, describing the functionality of each type, and explaining where it fits in the OSI 7-layer model.
It may be useful for you to group items by OSI layer, as weve done here, when learning their features and functionality for the Network+ exam. Knowing which layer a device fits into can provide clues as to its functionality and even a starting point for troubleshooting a network issue.
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