Download PDF by Allan Johnson: 31 Days Before Your CCNA Exam: A day-by-day review guide for

By Allan Johnson

ISBN-10: 1587131978

ISBN-13: 9781587131974

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

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

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Data Encapsulation Summary Each layer of the TCP/IP model adds its own header information. As the data travels down through the layers, it is encapsulated with a new header. At the network access layer, a trailer is also added. This encapsulation process can be described in five steps: Step 1 Create and encapsulate the application data with any required application layer headers. For example, the HTTP OK message can be returned in an HTTP header, followed by part of the contents of a web page. Step 2 Encapsulate the data supplied by the application layer inside a transport layer header.

6. Intermediary devices process the bits at the network access and Internet layers, and then for- ward the data toward the destination. 7. Web server receives the bits on the physical interface and sends up through the network access and Internet layers. 8. Web server sends a TCP acknowledgement back to the requesting web client. 9. Web server sends the HTTP response down to the transport layer. 10. TCP encapsulates the HTTP data. 11. IP encapsulates the transport segment into a packet, adding source and destination addresses.

9. Lower layers process and send the response to the requesting web client. 10. Requesting web client sends acknowledgement back to the web server. The operation of IP not only includes addressing, but also the process of routing the data from source to destination. IP will be further discussed and reviewed in the upcoming days. Day 29 27 The TCP/IP Network Access Layer IP depends on the network access layer to deliver IP packets across a physical network. Therefore, the network access layer defines the protocols and hardware required to deliver data across some physical network by specifying exactly how to physically connect a networked device to the physical media over which data can be transmitted.

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


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