Scenario 4Determining the Probable Source II

Scenario 4”Determining the Probable Source II

For this final scenario, let's look at Figure C.3 a little differently. We already know that the first floor PCs can successfully ping themselves, but cannot ping their default gateway. What would be the most likely scenario if the PCs on the second floor could successfully ping themselves and the Fast Ethernet 0/0 interface, which is the default gateway of the PCs on the first floor?

If you know Cisco devices, you know that an address on a router interface is only successfully pingable if the interface is up and the protocols are configured correctly. This means that the Fast Ethernet 0/0 interface must be functioning and the configured address must be correct. Since the PCs can ping each other, this pretty much narrows down the possibilities to a single item. The default gateway configured on the PCs is wrong or not configured.

Conclusion

These are all scenarios you are likely to encounter on the exam. You should know subnetting and how ICMP works, as well as all the information found on the Cram Sheet at the front of the book. If you have a good understanding of all these items, as well as items taught to you throughout this book, you will pass the exam with a great score. Good luck.

Appendix D. What's on the CD-ROM

This appendix is a brief rundown of what you'll find on the CD-ROM that comes with this book. For a more detailed description of the PrepLogic Practice Exams, Preview Edition exam simulation software, see Appendix E, "Using PrepLogic Practice Exams, Preview Edition Software." In addition to the PrepLogic Practice Exams, Preview Edition software, the CD-ROM includes an electronic version of the book in Portable Document Format (PDF) and the source code used in the book.

PrepLogic Practice Tests, Preview Edition

PrepLogic is a leading provider of certification training tools. Trusted by certification students worldwide, PrepLogic is, we believe, the best practice exam software available. In addition to providing a means of evaluating your knowledge of the Exam Cram material, PrepLogic Practice Exams, Preview Edition features several innovations that help you to improve your mastery of the subject matter.

For example, the practice tests allow you to check your score by exam area or domain to determine which topics you need to study more. Another feature allows you to obtain immediate feedback on your responses in the form of explanations for the correct and incorrect answers.

PrepLogic Practice Exams, Preview Edition exhibits most of the full functionality of the Premium Edition but offers only a fraction of the total questions. To get the complete set of practice questions and exam functionality, visit PrepLogic.com and order the Premium Edition for this and other challenging exam titles.

Again for a more detailed description of the PrepLogic Practice Exams, Preview Edition features, see Appendix E.

An Exclusive Electronic Version of the Text

As mentioned previously, the CD-ROM that accompanies this book also contains an electronic PDF version of this book. This electronic version comes complete with all figures as they appear in the book. You can use Acrobat's handy search capability for study and review purposes.

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Scenario 4Determining the Probable Source II