Download Accessing the WAN CCNA Exploration Companion Guide by Bob Vachon PDF

By Bob Vachon

Accessing the WAN

CCNA Exploration spouse Guide


Bob Vachon

Rick Graziani


Accessing the WAN, CCNA Exploration significant other Guide is the respectable supplemental textbook for the gaining access to the WAN path within the Cisco Networking Academy CCNA Exploration curriculum model four. This path discusses the WAN applied sciences and community prone required via converged functions in company networks. The better half consultant, written and edited by way of Networking Academy teachers, is designed as a conveyable table connection with use each time, wherever. The book’s beneficial properties toughen the fabric within the direction that will help you concentrate on vital suggestions and set up your learn time for tests.


New and more desirable beneficial properties assist you examine and reach this course:

  • Chapter pursuits: assessment center innovations through answering the focal point questions indexed in the beginning of every bankruptcy.
  • Key phrases: confer 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 finished thesaurus 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 notice at the on-line direction quizzes. the reply key explains every one answer.
  • Challenge questions and actions: attempt to ace tougher overview questions and actions designed to arrange you for the complicated kinds of questions you may see at the CCNA examination. the reply key explains every one answer.


Bob Vachon is the coordinator of the pc platforms expertise software and teaches networking infrastructure classes at Cambrian collage in Sudbury, Ontario, Canada. Bob has labored and taught within the machine networking and data expertise box for 25 years and is a pupil graduate of Cambrian College. 


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


How To: search for this icon to review the stairs you must discover ways to practice definite tasks.


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

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


Also to be had 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 offers many beneficial 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 goals
  • More IT profession Information
  • Tips on Lifelong studying in Networking


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

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Additional resources for Accessing the WAN CCNA Exploration Companion Guide

Example text

Because of the switching operation used to establish the circuit, the telephone system is called a circuit-switched network. If the telephones are replaced with modems, the switched circuit can carry computer data. Figure 1-18 Circuit Switching Dialing B … A Ringing… B The internal path taken by the circuit between exchanges is shared by a number of conversations. Time-division multiplexing (TDM) gives each conversation a share of the connection in turn. TDM ensures that a fixed-capacity connection is made available to the subscriber.

When the cell is carrying segmented network layer packets, the overhead is higher, because the ATM switch must be able to reassemble the packets at the destination. A typical ATM line needs almost 20 percent more bandwidth than Frame Relay to carry the same volume of network layer data. ATM was designed to be extremely scalable. It can support link speeds of T1/E1 to OC-12 (622 Mbps) and higher. ATM offers both PVCs and SVCs, although PVCs are more common with WANs. And as with other shared technologies, ATM allows multiple VCs on a single leased-line connection to the network edge.

It enables the enterprise to use Internet and partner resources and provide resources for its customers. The Enterprise WAN and metropolitan-area network (MAN) Architecture, which the technologies covered later in this course are relevant to, are considered part of this module. qxp 16 3/31/08 3:33 PM Page 16 Accessing the WAN, CCNA Exploration Companion Guide The enterprise edge aggregates the connectivity from the various functional areas at the enterprise edge (e-commerce, Internet connectivity, and VPNs) and routes the traffic into the campus core submodule.

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