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 better half Guide is the respectable 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 means of converged purposes in company networks. The significant other consultant, written and edited through Networking Academy teachers, is designed as a transportable table connection with use each time, at any place. The book’s positive factors toughen the cloth within the path that will help you concentrate on vital techniques and arrange your learn time for checks.


New and enhanced good points assist you research and achieve this course:

  • Chapter goals: assessment center techniques by means of answering the point of interest questions indexed firstly 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 finished thesaurus with greater than 250 terms.
  • Check Your knowing questions and solution key: review 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 each one answer.
  • Challenge questions and actions: try to ace more difficult evaluation questions and actions designed to arrange you for the complicated types of questions you may see at the CCNA examination. the reply key explains every one answer.


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


Rick Graziani teaches computing device technological know-how and machine networking classes at Cabrillo university in Aptos, California. Rick has labored and taught within the desktop networking and data know-how box for 30 years.


How To: search for this icon to review the stairs that you have to learn how to practice yes tasks.


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

Packet Tracer v4.1 constructed via Cisco. The documents 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 beneficial instruments and data to aid your education:

Packet Tracer task workout files

  • A consultant 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 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

Sample text

Not only must a network meet the business’s day-to-day operational needs, but it also needs to be able to adapt and grow as the company changes. Network designers and administrators meet these challenges by carefully choosing network technologies, protocols, and service providers, and by optimizing their networks using many of the techniques we teach in this series of courses. The next sections describe a model for designing networks that can accommodate the changing needs of today’s evolving businesses.

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. There are two approaches to this link determination: ■ Connectionless systems, such as the Internet, carry full addressing information in each packet.

25 and operate at the data link layer of the OSI reference model. Public switched telephone network (PSTN) switches may also be used within the cloud for circuit-switched connections such as Integrated Services Digital Network (ISDN) or analog dialup. ■ Router: Provides internetworking and WAN access interface ports that are used to connect to the service provider network. These interfaces may be serial connections or other WAN interfaces. With some types of WAN interfaces, an external device such as a DSU/CSU or modem (analog, cable, or DSL) is required to connect the router to the service provider’s local point of presence (POP).

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