By Bob Vachon
Getting access to the WAN CCNA Exploration spouse advisor Bob Vachon Rick Graziani having access to the WAN, CCNA Exploration significant other advisor is the professional supplemental textbook for the getting access to the WAN path within the Cisco Networking Academy CCNA Exploration curriculum model four. This path discusses the WAN applied sciences and community providers required via converged purposes in firm networks. The significant other advisor, 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 strengthen the cloth within the path that can assist you concentrate on vital strategies and set up your learn time for checks. New and better gains assist you learn and achieve this direction: bankruptcy ambitions: overview center techniques by means of answering the focal point questions indexed firstly of every bankruptcy. keywords: check with the up to date lists of networking vocabulary brought and switch to the highlighted phrases in context in every one bankruptcy. word list: seek advice the all-new complete word list with greater than 250 phrases. payment Your figuring out questions and solution 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 each one solution. problem questions and actions: attempt to ace more difficult assessment 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 resolution. 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 machine networking and data 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 data expertise box for 30 years. how one can: search for this icon to check the stairs it is advisable to discover ways to practice sure initiatives. Packet Tracer actions: discover networking options 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. additionally on hand for the having access to the WAN direction having access to the WAN, CCNA Exploration Labs and learn advisor ISBN-10: 1-58713-201-X ISBN-13: 978-1-58713-201-8 spouse CD-ROM The CD-ROM offers many helpful instruments and knowledge to help your schooling: Packet Tracer job workout records A consultant to utilizing a Networker’s magazine book Taking Notes: A .txt dossier of the bankruptcy pursuits extra IT profession info tips about 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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Extra resources for Accessing the WAN, CCNA Exploration Companion Guide
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. ■ WAN switch: A multiport internetworking device used in carrier networks. 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.
As the business has expanded, the network has also grown. Instead of a single small LAN, the network now consists of several subnetworks, each devoted to a different department. For example, all the engineering staff are on one LAN, and the marketing staff is on another LAN. These multiple LANs are joined to create a company-wide network, or campus, which spans several floors of the building. Figure 1-3 shows Span Engineering’s expanded campus LAN. The business now has in-house IT staff to support and maintain the network.
WAN Technology Overview A variety of protocols and technologies are used in wide-area networks. Some of these services, such as HDLC and Frame Relay, are explained in more detail later in this book. As described in relation to the OSI reference model, WAN operations focus primarily on Layer 1 and Layer 2, as shown in Figure 1-11. WAN access standards typically describe both physical layer delivery methods and data link layer requirements, including physical addressing, flow control, and encapsulation.
Accessing the WAN, CCNA Exploration Companion Guide by Bob Vachon