Avaya Configuring IP Utilities Manual do Utilizador descarregar pdf (Página 39)

308631-14.00 Rev 00

2-1

Chapter 2

Overview of IP Utilities

This chapter describes the concepts behind TCP, FTP, TFTP, Telnet, NTP, DNS,

and NetBIOS over IP services and how Nortel Networks routers implement them.

You can use this information to decide how to customize TCP, FTP, TFTP, Telnet,

NTP, DNS, and NetBIOS over IP parameters for your system.

TCP Overview

In the 1970s, the Defense Advanced Research Projects Agency (DARPA) of the

U.S. Department of Defense (DOD) developed the Transmission Control Protocol

(TCP) to provide communication among hosts manufactured by different vendors.

DARPA designed TCP to work within a layered hierarchy of networking

protocols, using the Internet Protocol (IP) to transfer data.

Built upon the IP layer suite, TCP is a connection-oriented, end-to-end protocol

that provides the packet sequencing, error control, and other services required to

provide reliable end-to-end communications. IP takes the packet from TCP and

passes it along whatever gateways are needed, for delivery to the remote TCP

layer through the remote IP layer.

Topic Page

TCP Overview 2-1

FTP Overview 2-7

TFTP Overview 2-10

Telnet Overview 2-11

NTP Overview 2-15

NetBIOS Overview 2-20

DNS Overview 2-24

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Avaya Configuring IP Utilities Manual do Utilizador Página 39