31 Days Before Your CCNA Exam: A day-by-day review guide for by Allan Johnson
By Allan Johnson
I like this e-book! It features a pullout 31 day calendar within the entrance, with a number of themes consistent with day for learn. 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 publication ), the writer offers an encapsulated evaluation on every one subject, via EXAMPLES of ways to do what used to be simply reviewed. *It's a 31-day, simply readable, condensed completely, textbook! (The ideal spouse in your CCNA perform examination books)
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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)
Port Length Checksum UDP Header * Unless Specified, Lengths Shown Are the Numbers of Bytes The TCP/IP Internet Layer The Internet layer of the TCP/IP model and its Internet Protocol (IP) defines addresses so that each host computer can have a different IP address. In addition, the Internet layer defines the process of routing so that routers can determine the best path to send packets to the destination. Continuing with the web page example, IP addresses the data as it passes from the transport layer to the Internet layer: 1.
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. HTTP at the application layer does not get involved in error recovery. In addition to TCP, the transport layer provides UDP—a connectionless, unreliable protocol for sending data that does not require nor need error recovery.
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.