HP MicroLogix 1761-NET-ENI manual Node

Glossary 2

Full-duplex

Ahigh-performance protocol that allows simultaneous two-way data transmission. For point-to-point applications only.

IP (Internet Protocol)

IP specifies the format of packets and the addressing scheme. Most networks combine IP with a higher-level protocol called Transport Control Protocol (TCP), which establishes a virtual connection between a destination and a source.

IP by itself is something like the postal system. It allows you to address a package and drop it in the system, but there's no direct link between you and the recipient. TCP/IP, on the other hand, establishes a connection between two hosts so that they can send messages back and forth for a period of time.

IP Address

A 32-bit address assigned to hosts that want to participate in a TCP/IP internet. IP addresses are the abstraction of physical hardware addresses, with a network and host partition which makes routing efficient.

NetLinx Services

The NetLinx services occur over the well-known port 0xAF12 and define a connection protocol that exists after a TCP/IP connection is established. It also defines a set of services and packet formats to support the protocol. Also implied by this protocol is that the end devices have implemented some portion of the ASA CIP addressing architecture.

Network

A series of stations (nodes) connected by some type of communication medium. A network may be made up of a single link or multiple links.

Node

Also called a station. An address or software location on the network.

MTA (Mail Transfer Agent)

The software function responsible for delivering outgoing mail to its final destination.

Publication 1761-UM006A-EN-P - February 2001