WAGO 750-830 Manual page 340

340 • Glossary
G
Gateway
Device for connecting two different networks, performs the translation be-
tween differing protocols.
H
Hardware
Electronic, electric and mechanical components of a module.
Header
A portion of the data packet, containing information such as the receiver's
address information.
Host
Originally used to describe a central mainframe computer accessed from
other systems. The services provided by the subscriber can be called up by
means of local and remote request. Today, host can also refer to computers
that provide certain services from a central location (such as UNIX hosts on
the Internet).
HTML (Hypertext Markup Language)
HTML is the descriptive language for documents on the World Wide Web. It
contains language elements for the design of hypertext documents.
HTTP (Hyper Text Transfer Protocol)
Client/Server TCP/IP protocol, which is used on the Internet or Intranets for
exchange of HTML documents. It normally uses Port 80.
Hub
A device, which allows communication between several network users via
Twisted pair cable. Its topology is star-shaped.
HVAC (Heating, Ventilation and Air Conditioning)
HVAC is a special sector of building automation services.
WAGO-I/O-SYSTEM 750
BACnet/IP Controller