Download e-book for kindle: Accessing the WAN CCNA Exploration Companion Guide by Bob Vachon

By Bob Vachon

Accessing the WAN

CCNA Exploration better half Guide


Bob Vachon

Rick Graziani


Accessing the WAN, CCNA Exploration spouse Guide is the professional supplemental textbook for the getting access to the WAN direction within the Cisco Networking Academy CCNA Exploration curriculum model four. This direction discusses the WAN applied sciences and community companies required by way of converged purposes in company networks. The significant other advisor, written and edited via Networking Academy teachers, is designed as a transportable table connection with use each time, at any place. The book’s beneficial properties strengthen the fabric within the path that can assist you specialise in vital options and set up your learn time for assessments.


New and more advantageous positive aspects assist you research and achieve this course:

  • Chapter pursuits: overview center strategies by way of answering the point of interest questions indexed firstly of every bankruptcy.
  • Key phrases: discuss with the up-to-date lists of networking vocabulary brought and switch to the highlighted phrases in context in every one bankruptcy.
  • Glossary: seek advice the all-new complete word list with greater than 250 terms.
  • Check Your knowing questions and resolution key: overview your readiness with the up to date end-of-chapter questions that fit the fashion of questions you spot at the on-line direction quizzes. the reply key explains every one answer.
  • Challenge questions and actions: try to ace tougher assessment questions and actions designed to organize you for the complicated kinds of questions chances are you'll see at the CCNA examination. the reply key explains every one answer.


Bob Vachon is the coordinator of the pc structures know-how software and teaches networking infrastructure classes at Cambrian university in Sudbury, Ontario, Canada. Bob has labored and taught within the desktop networking and knowledge expertise box for 25 years and is a pupil graduate of Cambrian College. 


Rick Graziani teaches laptop technology and computing device networking classes at Cabrillo collage in Aptos, California. Rick has labored and taught within the computing device networking and knowledge expertise box for 30 years.


How To: search for this icon to check the stairs you might want to learn how to practice definite tasks.


Packet Tracer actions: discover networking suggestions in actions interspersed all through a few chapters utilizing

Packet Tracer v4.1 built by way of Cisco. The records for those actions are at the accompanying CD-ROM.


Also on hand for the getting access to the WAN Course

Accessing the WAN,

CCNA Exploration

Labs and research consultant

ISBN-10: 1-58713-201-X

ISBN-13: 978-1-58713-201-8


Companion CD-ROM

The CD-ROM presents many helpful instruments and data to aid your education:

Packet Tracer task workout files

  • A advisor to utilizing a Networker’s magazine booklet
  • Taking Notes: A .txt dossier of the bankruptcy pursuits
  • More IT profession Information
  • Tips on Lifelong studying in Networking


This publication is a part of the Cisco Networking Academy sequence from Cisco Press. the goods during this sequence aid and supplement the Cisco Networking Academy on-line curriculum.

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Example text

Figure 1-7 Hierarchical Network Model in Campus Environments Core Distribution Access Access WAN Internet Telephone Network Networking technologies have advanced considerably in recent years, resulting in networks that are increasingly intelligent. The current network elements are more aware of traffic characteristics and can be configured to deliver specialized services based on such things as the types of data they carry, the data’s priority, and even the security needs. Although most of these various infrastructure services are outside the scope of this course, it is important to understand that they influence network design.

However, they are still in use in many portions of the developing world, which have limited access to newer technologies. Frame Relay Figure 1-25 shows a Frame Relay network. 25 in several ways. 25 additionally provides Layer 3 services. Frame Relay implements no error or flow control. The simplified handling of frames leads to reduced latency, and measures taken to avoid frame buildup at intermediate switches help reduce jitter. Frame Relay offers data rates up to 4 Mbps, with some providers offering even higher rates.

The distribution layer aggregates the wiring closets, using switches to segment workgroups and isolate network problems in a campus environment. Similarly, the distribution layer aggregates WAN connections at the edge of the campus and provides policy-based connectivity. qxp 12 3/31/08 3:33 PM Page 12 Accessing the WAN, CCNA Exploration Companion Guide ■ The core layer (also called the backbone) is a high-speed backbone that is designed to switch packets as fast as possible. Because the core is critical for connectivity, it must provide a high level of availability and adapt to changes very quickly.

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