Feeling the need to talk to the teacher - but you're doing self-study? These CCENT and CCNA Chapter Plans are videos with Wendell spelling out how to approach studying each chapter of the ICND1 and ICND2 books.
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Wendell poses a question. You answer, and ask clarifying questions. Wendell posts the answer and explanation. You inquire again as needed. Join in the practice and discussion!
The undisputed number 1 most important CCENT topic? IP Subnetting. Want more exercises? The CCENT Skills blog, has a variety of options.