Siemens SE505 - Manual (Page 128)

132
Glossary
Gigaset SE505 dsl/cable / English / A31008-E505-B100-1-7619 / glossary.fm / 16.07.2003
Tunneling
Tunneling is a procedure in which the data traffic of one
Protocol is transmitted with the
help of a different protocol. For example, data packets of a private network can be
packed into IP packets and sent over the Internet as if through a tunnel. Tunneling
procedures are used nowadays for the secure transmission of data in a Virtual Private
Network ( VPN ). The IP packets from the local network are encrypted using a tunneling
protocol (e. g. PPTP ) before being sent over the Internet.
UDP
User Datagram Protocol
UDP is a
Protocol of the TCP/IP protocol family that handles data transport between
communication partners (applications). Unlike TCP , UDP is a non-session based
protocol. It does not establish a fixed connection. The data packets, so-called
datagrams, are sent as a Broadcast . The recipient is responsible for making sure the data
is received. The sender is not notified about whether it is received or not.
UPnP
Universal Plug and Play
UPnP technology is used for the spontaneous linking of home or small office networks.
Devices that support UPnP carry out their network configuration automatically once
they are connected to a network. They also provide their own services or use services of
other devices on the network automatically.
URL
Universal Resource Locator
Globally unique address of a Domain on the
Internet .
Virtual server
A virtual
Server provides a service on the Internet that runs not on itself but on another
network component. The Gigaset SE505 dsl/cable can be configured as a virtual server.
It will then direct incoming calls for a service via Port Forwarding directly to the
appropriate Port of the network component in question.
VPN
Virtual Private Network
A VPN is a network connection in which the data are transmitted over the
Internet using
special Tunneling protocols (e.g. PPTP , L2TP , IPSec ) securely, i.e. encrypted. VPNs are
used to connect private networks at different locations with each other without having
to lease a transmission line. The Internet is used instead.
WAN
Wide Area Network
A WAN is a network that is not restricted to one particular area, such as the
Internet . A
WAN is run by one or more public providers to enable private access. You access the
Internet via an Internet Service Provider .
WEP
Wired Equivalent Privacy
WEP is a security protocol defined in the
IEEE 802.11 standard. It is used to protect
wireless transmissions in a WLAN against unauthorised access through Encryption of
the data transmitted.