31 Days Before Your CCNA Exam: A Day-By-Day Review Guide for by Allan Johnson

By Allan Johnson

31 Days sooner than your CCNA examination, moment version, provides you with a personable and functional approach to comprehend the certification procedure, decide to taking the examination, and end your instruction utilizing quite a few Foundational and Supplemental learn assets.   The publication breaks down key examination issues into 31 day-by-day evaluation classes utilizing brief summaries, lists, tables, examples, and snap shots. A examine assets part provide you with a brief reference for finding extra in-depth remedy of a day’s themes in the proper Foundational and Supplemental assets. Use this daily advisor to arrange, arrange, and evaluation all of the CCNA® pursuits. The beneficial properties of the publication empower you to slot examination coaching into an another way busy time table: Tear out visible calendar summarizes each one day’s learn issues list highlights very important initiatives and points in time major as much as your examination Description of the 640-802 CCNA examination association and register strategy, contains tips to use a voucher options from the writer assist you to be mentally, organizationally, and bodily ready for examination day Conversational tone, making your learn time extra stress-free   Allan Johnson entered the educational international in 1999 after ten years as a company proprietor and operator. He has a fondness for instructing and holds either an MBA and an M.Ed in occupational education and improvement. Allan presently works complete time constructing CCNA educational help and coaching fabrics.   type: Cisco® Certification   $29.99 united states / $32.99 CAN  

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Extra resources for 31 Days Before Your CCNA Exam: A Day-By-Day Review Guide for the 640-802 Exam, 2nd Edition

Example text

Video over IP has the same performance issues as voice. However, video requires a lot more bandwidth—anywhere from 300 kbps to 10 Mbps, depending on the quality demanded. To support the QoS requirements of voice, video, and other quality or time-sensitive applications, routers and switches can be configured with a variety of QoS tools. These configurations are beyond the scope of the CCNA exam topics. Day 30 19 Study Resources For today’s exam topics, refer to the following resources for more study.

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.

So let’s quickly review the OSI layers and the TCP/IP protocols. OSI Layers Table 30-1 summarizes the layers of the OSI model and provides a brief functional description. Table 30-1 The OSI Model Layers and Functions Layer Functional Description Application (7) Refers to interfaces between network and application software. Also includes authentication services. Presentation (6) Defines the format and organization of data. Includes encryption. Session (5) Establishes and maintains end-to-end bidirectional flows between endpoints.

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