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CCNA Cisco Certified Network Associate Study Guide (Exam 640-802), 3rd Edition by Richard Deal

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15
Routers and Routing
CERTIFICATION OBJECTIVES
 
The preceding part of the book focused on switches and protocols that function at layer 2. This part of the book moves up one layer in the OSI Reference Model to discuss layer 3, the network layer. Layer 3 devices are generically called routers. Routers basically have two functions:
 
   To find a layer 3 path to a destination ...

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