The switch contains an optical module
Switch optical modules, which convert electrical signals to optical signals and vice – versa, and optical interfaces, which serve as the physical connection points, play a pivotal role in determining the speed, distance, and reliability of data transmission. An optical module is a component that completes electrical/optical conversion on an optical. The Cisco Small Business Series Switches allow you to plug in a Small Form-factor Pluggable (SFP) transceiver in their optical modules to connect fiber-optic cables.
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