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

By Allan Johnson

ISBN-10: 1587131978

ISBN-13: 9781587131974

I admire this ebook! It encompasses a pullout 31 day calendar within the entrance, with a couple of themes according to day for research. contained in the booklet isn't really a host of questions ( so do not count on this to be simply one other run of the mill perform exame e-book ), the writer presents an encapsulated assessment on every one subject, by means of EXAMPLES of ways to do what used to be simply reviewed. *It's a 31-day, simply readable, condensed completely, textbook! (The ideal better half 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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Sample text

The growth of email: The general acceptance of email as both a personal and business communications service has greatly increased the amount of email traffic. ■ The rapid commercialization of the Internet: Enabling companies to offer data directly to their customers via the data network rather than via phone calls. 18 31 Days Before Your CCNA Exam The Impact of Voice and Video on the Network Currently, voice and video are in the midst of a migration to traditional IP data networks. Before the late 1990s, voice and video used separate networking facilities.

2. TCP encapsulates the HTTP request. 3. IP encapsulates the transport segment into a packet, adding source and destination addresses. 4. Network access layer encapsulates packet in a frame, addressing it for the local link. 5. Network access layer sends the frame out as bits on the media. 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.

Network models provide a variety of benefits: ■ Reduce complexity ■ Standardize interfaces ■ Assist understanding ■ Promote rapid product development ■ Support interoperability ■ Facilitate modular engineering Initially, networks were built on proprietary standards and hardware. Layered models, such as the TCP/IP and OSI models, support interoperability between competing vendor product lines. The OSI model development began in the 1970s with the goal to provide a standards-based suite of protocols that would allow communication between all computer systems.

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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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