The switch looks at the previously learned MAC addresses in an address table to decide where to forward the frames. ■ Forwarding or filtering-The switch decides when to forward a frame or when to filter (not forward) it based on the destination MAC address. By learning, the switch can make good forwarding choices in the future. ■ Learning-The switch learns MAC addresses by examining the source MAC address of each frame the bridge receives. Although this section does not list everything that will be on the exam, a well-prepared CCNA candidate should at a minimum know all the details in each Foundation Summary before taking the exam. The “Foundation Summary” section lists the most important facts from the chapter. The Integrated IS-IS Link State Routing ProtocolĢ8 Chapter 1: LAN Switching Review and Configuring Cisco 2950 LAN Switches Foundation Summary.Routing Through the Internet with the Border Gateway Protocol.Comparing and Contrasting IP Routing Protocols.Hands-on Exercises Available with NetSim.
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