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UDP (User Datagram
Protocol)
UPnP (Universal Plug and
Play)
URL (Uniform Resource
Locator)
VLAN (Virtual Local Area
Network)
VPN (Virtual Private
Network)
WAN (Wide Area Network)
WLAN (Wireless LAN)
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UDP is a TCP/IP protocol to control data traffic between two communication partners
(application). UDP, in contrast to TCP, is an unsecured protocol. UCP is a so-called
connection-less protocol. The data packages, so-called datagrams, are sent as
broadcasts. The recipient is responsible for receiving data. The sender does not
receive notification if the data packages were received.
UPnP technology was designed for home and office networks. Devices supporting
UPnP automatically configure their network settings as soon as connected to a
network. In addition, they automatically provider own services or use services of other
devices on the network.
A URL is the information source, e.g. http://www.siemens.com. The URL is a unique
web address that identifies a resource via the network protocol used (e.g. http) and the
location of the resource on the network.
"Universal Resource Locator" incorrectly is used for URL "Uniform Resource Locator"
or "unique web address".
VLAN is a virtual local area network within a physical network.
VPN denotes security technologies allowing to establish authenticated and encrypted
communication tunnels via the Internet (also called tunneling). The information to be
transferred is protected and transfer monitored. VPN creates the impression of a
private network that employ the "unsecure" medium Internet as "secure"
communications infrastructure.
The wide area network WAN has a spatial dimension of ca. 50 km. A WAN can
comprise a number of several LANs. If an ISP operates a WAN, private LAN users
receive access to the Internet.
Wireless LANs allow network devices to communicate via radio. The WALN can be
added as an extension to a wired LAN, or it can be the basis of a new network.
Commissioning instructions OZW775 V2.01
Appendix
CE1C5663en
22.06.2012
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