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packet tracer - Fiber-optic connection between two routers is always off, regardless of any configuration - Network Engineering Stack Exchange
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How to Add or Remove Interfaces on Routers in Packet Tracer | Router Switch Configuration Using Packet Tracer GNS3
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cisco - Is it possible to connect a router and a switch using fiber-optic cable in Packet Tracer? - Network Engineering Stack Exchange
Cisco Networking Academy - This year, make your new year's resolution to spend more time networking. Download Packet Tracer to make it happen: http://cs.co/6186DHglK Credit: Wady Venegas | Facebook
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