By Allan Johnson
I like this e-book! It incorporates a pullout 31 day calendar within the entrance, with a number of subject matters in keeping with day for research. contained in the ebook isn't a number of questions ( so do not count on this to be simply one other run of the mill perform exame ebook ), the writer offers an encapsulated overview on every one subject, by means of EXAMPLES of the way to do what used to be simply reviewed. *It's a 31-day, simply readable, condensed completely, textbook! (The excellent significant other in your CCNA perform examination books)
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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Additional info for 31 Days Before Your CCNA Exam: A day-by-day review guide for the CCNA 640-802 exam (2nd Edition)
Lower layers process and send the request to the web server. 4. Web server receives HTTP requests and sends a TCP acknowledgement back to the request- ing web client. 5. Web server sends the HTTP response down to the transport layer. 6. TCP encapsulates the HTTP data with a TCP header. 7. Lower layers process and send the response to the requesting web client. 8. Requesting web client sends acknowledgement back to the web server. If data is lost at any point during this process, it is TCP’s job to recover the data.
Figure 30-2 Converting from Sound to Packets with a VA VolIP Packet IP 3 2 Analog Electricity CODEC 1 Human VA Speech Phone #1 UDP RTP Digital Voice Bits 4 Cable or R1 DSL VoIP does not place a demand on the network for additional capacity. A voice call typically consumes less than 30 kbps of bandwidth. 2 seconds). This is a much lower delay than what is required by typical data applications. ■ Low jitter: Jitter is the variation in delay. VoIP requires very low jitter as well, whereas data applications can tolerate much higher jitter.
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. 12. Network access layer encapsulates packet in a frame, addressing it for the local link. 13. Network access layer sends the frame out as bits on the media. 14. Lower layers process and send the response to the requesting web client. 15. Response travels back to the source over multiple data links.