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1. Introduction Connected: An Internet Encyclopedia
1. Introduction

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Up: RFC 1332
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Next: 2. A PPP Network Control Protocol (NCP) for IP

1. Introduction

1. Introduction

PPP has three main components:

  1. A method for encapsulating datagrams over serial links.

  2. A Link Control Protocol (LCP) for establishing, configuring, and testing the data-link connection.

  3. A family of Network Control Protocols (NCPs) for establishing and configuring different network-layer protocols.

In order to establish communications over a point-to-point link, each end of the PPP link must first send LCP packets to configure and test the data link. After the link has been established and optional facilities have been negotiated as needed by the LCP, PPP must send NCP packets to choose and configure one or more network-layer protocols. Once each of the chosen network-layer protocols has been configured, datagrams from each network-layer protocol can be sent over the link.

The link will remain configured for communications until explicit LCP or NCP packets close the link down, or until some external event occurs (an inactivity timer expires or network administrator intervention).


Next: 2. A PPP Network Control Protocol (NCP) for IP

Connected: An Internet Encyclopedia
1. Introduction

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