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

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By Bob Vachon

Accessing the WAN

CCNA Exploration spouse Guide


Bob Vachon

Rick Graziani


Accessing the WAN, CCNA Exploration better half Guide is the reliable 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 prone required by means of converged functions in firm networks. The significant other consultant, written and edited by means of Networking Academy teachers, is designed as a transportable table connection with use each time, at any place. The book’s positive factors make stronger the fabric within the direction that can assist you specialise in vital thoughts and manage your research time for assessments.


New and enhanced positive factors assist you learn and achieve this course:

  • Chapter goals: assessment middle suggestions by way of answering the point of interest questions indexed at first of every bankruptcy.
  • Key phrases: seek advice from 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 accomplished thesaurus with greater than 250 terms.
  • Check Your figuring out questions and resolution key: assessment 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 overview questions and actions designed to arrange you for the complicated forms of questions it's possible you'll see at the CCNA examination. the reply key explains every one answer.


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


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


How To: search for this icon to check the stairs it's worthwhile to learn how to practice convinced tasks.


Packet Tracer actions: discover networking techniques 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 on hand for the having access to the WAN Course

Accessing the WAN,

CCNA Exploration

Labs and examine advisor

ISBN-10: 1-58713-201-X

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


Companion CD-ROM

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

Packet Tracer job workout files

  • A advisor to utilizing a Networker’s magazine booklet
  • Taking Notes: A .txt dossier of the bankruptcy ambitions
  • More IT occupation 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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Extra resources for Accessing the WAN CCNA Exploration Companion Guide

Example text

PSTN and ISDN are two types of circuit-switching technology that may be used to implement a WAN in an enterprise setting. Packet Switching In contrast to circuit switching, packet switching splits traffic data into packets that are routed over a shared network. Packet-switching networks do not require a circuit to be established, and they allow many pairs of nodes to communicate over the same channel. The switches in a packet-switched network determine which link the packet must be sent on next from the addressing information in each packet.

The two are often combined into a single piece of equipment, called the CSU/DSU. The CSU provides termination for the digital signal and ensures connection integrity through error correction and line monitoring. The DSU converts the T-carrier line frames into frames that the LAN can interpret and vice versa. qxp 3/31/08 3:33 PM Page 21 Chapter 1: Introduction to WANs 21 ■ Access server: Concentrates dial-in and dial-out user communications. An access server may have a mixture of analog and digital interfaces and support hundreds of simultaneous users.

This section describes the pros and cons of using analog dialup connection options and describes the types of business scenarios that benefit most from this type of option. Figure 1-22 shows an analog dialup connection. qxp 3/31/08 3:33 PM Page 33 Chapter 1: Introduction to WANs 33 Traditional telephony uses a copper cable, called the local loop, to connect the telephone handset in the subscriber premises to the CO. The signal on the local loop during a call is a continuously varying electronic signal that is a translation of the subscriber analog voice signal.

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