CCNA Exploration - Accessing the WAN - Parent Directory.doc

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CCNA Exploration - Accessing the WAN
2 PPP
Chapter Introduction
Chapter Introduction
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This chapter starts your exploration of WAN technologies by introducing point-to-munications and the Point-to-Point Protocol (PPP).
One of the mon types of WAN connection is the point-to-point connection. Point-to-point connections are used to connect LANs to service provider WANs, and to connect LAN segments within an work. A LAN-to-WAN point-to-point connection is also referred to as a serial connection or leased-line connection, because the lines are leased from a carrier (usually a pany) and are dedicated for use by pany leasing the lines. Companies pay for a continuous connection between two remote sites, and the line is continuously active and available. Understanding how point-to-munication links function to provide access to a WAN is important to an overall understanding of how WANs function.
Point-to-Point Protocol (PPP) provides multiprotocol LAN-to-WAN connections handling TCP/IP, work Packet Exchange (IPX), and AppleTalk simultaneously. It can be used over twisted pair, fiber-optic lines, and satellite transmission. PPP provides transport over ATM, Frame Relay, ISDN and optical links. In works, security is a key concern. PPP allows you to authenticate connections using either Password Authentication Protocol (PAP) or the more effective Challenge Handshake Authentication Protocol (CHAP). These are taught in the fourth section.
In this chapter you will also learn the key concepts of munications, and how to configure and troubleshoot a PPP serial connection on a Cisco router.
- Chapter Introduction
The diagram depicts the chapter objectives:
- Describe the fundamental concepts of point-to-point munication.
- Describe key P P P concepts.
- Configure P P P encapsulation.
- Explain and configure PAP and CHAP authentication.
Serial Point-to-Point Links
Introducing mun