Read e-book online 31 Days Before Your CCNA Exam: A day-by-day review guide for PDF

By Allan Johnson

I like this publication! It features a pullout 31 day calendar within the entrance, with a couple of subject matters in line with day for learn. contained in the e-book isn't a number of questions ( so do not count on this to be simply one other run of the mill perform exame publication ), the writer offers an encapsulated evaluate on each one subject, by means of EXAMPLES of the way to do what was once simply reviewed. *It's a 31-day, simply readable, condensed completely, textbook! (The excellent significant other for your CCNA perform examination books)

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Read Online or Download 31 Days Before Your CCNA Exam: A day-by-day review guide for the CCNA 640-802 exam (2nd Edition) PDF

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Extra info for 31 Days Before Your CCNA Exam: A day-by-day review guide for the CCNA 640-802 exam (2nd Edition)

Sample text

The exam then grades the question based on the configuration you changed or added. A newer form of the simulation question is the GUI-based simulation, where a graphical interface like that found on a Linksys router or the Cisco Security Device Manager is simulated. What Topics Are Covered on the CCNA Exam The topics of the CCNA 640-802 exam focus on the following eight key categories: ■ Describe how a network works. ■ Configure, verify and troubleshoot a switch with VLANs and interswitch communications.

Figure 29-2 TCP Acknowledgment Without Errors Web Browser Web Server 1000 Bytes of Data, Sequence = 1000 1000 Bytes of Data, Sequence = 2000 1000 Bytes of Data, Sequence = 3000 I Got All 3000 Bytes. Send ACK! No Data, Acknowledgment = 4000 Figure 29-3 depicts the same scenario, except that now we have some errors. The second TCP segment was lost in transmission. Therefore, the web client replies with an ACK field set to 2000. The web server will now resend data starting at segment 2000. In this way, lost data is recovered.

IP encapsulates the transport segment into a packet, adding source and destination addresses. 4. Lower layers process and send the request to the web server. 5. Web server receives HTTP requests and sends a TCP acknowledgement back to the request- ing web client. 6. Web server sends the HTTP response down to the transport layer. 7. TCP encapsulates the HTTP data. 8. IP encapsulates the transport segment into a packet, adding source and destination address- es. 9. Lower layers process and send the response to the requesting web client.

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