From 123-CBT Computer Based Training
Cisco Internetwork Troubleshooting Part 1 

...ding encapsulated data flows between end-systems.
Match networking devices with their associated logical layers.
Identify symptoms of problems that occur at the physical layer.
Identify symptoms of problems that occur at the data link layer.
Match
Cisco commands used to isolate physical and data link layer problems with their functions.
Identify commands used to resolve problems at
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Interconnecting Cisco Networking Devices Part 1 

... the
Cisco CCNA ICND exam
640-811 - Interconnecting Cisco Networking Devices. The course shows you how to configure a catalyst switch for basic operations. Topics covered include switching, spanning tree protocol, and access layer switch configuration. This course also describes the features and operation of
VLANs, and shows you how to configure and troubleshoot them.
Learn To:
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