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All Rights Reserved. Copyright © 2000, Yokogawa Electric Corporation
TI 04L01A01-02E
FTP (file transfer protocol)
FTP is a file transfer protocol that works above the TCP/IP protocol layer. It supports many types of
files such as ASCII and binary files.
The DX Series uses FTP to automatically transfer data and report files to the data server.
The client PC can also use FTP to access the files on the recording medium of the DX Series.
Server
This computer provides management services like file storage, input/output, access, or services like
printout or communication control. Server is for providing specified services such as File server to
share files, Print server to share printers, or Database server to share database.
Client
This computer utilizes the services provided by Server. It indicates user side computer terminals or
programs on the terminals.
For example, when there are two computers, one computer has database and the other requests to
search data to the former computer, the former one is called Server and the latter one is called Client.
Hub
Hub is a node (station) placed in the center of Star-type network. Generally, it indicates a device with
repeater or switching functions, which gathers twist-pair cables for 10BASE-T. Sometimes, it is a
general term for LAN gathering device. There are various kinds such as SNMP (simple network
management protocol), intelligent HUB with agent function, dumb HUB without agent function,
stackable HUB and so on. When number of ports is insufficient, plural HUBs can be connected by
cascade or stack connections.
Router
Router is a station to connect LANs or LAN and WAN (wide area network). It analyzes protocols of
data (packet) flowing on one network, and transfers the data after selecting the best route. Since it has
a function to set data transfer routes, it is a suitable device to connect different networks or WAN. It
also has a filter function to stop transferring data to the sites not relevant for them.
ISDN(integrated services digital network)
Total service digital communication network. Digital communication network, which provides
integrated service of telephone, fax, internet and so on.