Avaya Configuring IP Utilities Manual de usuario descargar pdf (Pagina 46)

Configuring IP Utilities

2-8

308631-14.00 Rev 00

How FTP Works

The FTP client initiates an FTP session with the FTP server on the router. The

session establishes two separate connections between host and router as follows:

• Control connection -- the communication path between the FTP client and the

FTP control server for the exchange of commands and replies used for

sending a command request or response.

• Data connection -- a full-duplex connection over which data is transferred in a

specified mode and type between FTP client and FTP server.

The FTP client residing on the host and the FTP server residing on the router rely

on the underlying support of TCP and IP for the reliable, sequenced transfer of

data and control messages (Figure 2-2

Figure 2-2. FTP Client and Server

FTP

Client

FTP

Server

TCP TCP

IP IP

LAN/WAN

Router

Control connection

Data connection

Key

Host

TCP0002A

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Avaya Configuring IP Utilities Manual de usuario Pagina 46