Technical data

352 • Glossary

WAGO-I/O-SYSTEM 750

BACnet/IP Controller

TCP (Transport Control Protocol)

TCP is a connection-oriented network protocol for the transport layer (Layer

4) of the ISO/OSI model provided with relatively secure transmission

mechanisms.

TCP/IP Protocol Stack

The TCP/IP protocol stack denotes network protocols that enable communi-

cation between different networks and topologies.

Telnet

The Telnet protocol fulfils the function of a virtual terminal. It allows re-

mote access from the user’s computer to other computer systems on the net-

work.

Traps

Traps are unsolicited messages, which are sent by an "agent" to a manage-

ment system, as soon as something unexpected and interesting for the man-

agement system happens. Traps are comparable to interrupts from hardware.

A well-known example of a trap message is the "Blue screen" with

Win95/98.

Twisted Pair

Twisted pair cables (abbreviated to TP).