VEGA MoRoS Modem - ISDN 1.3 - Manual (Page 85)

MoRoS Modem - ISDN 1.3 Glossary
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SMS: Short Message Service: Memos can be sent via the mobile network GSM.
Socket: Data connections coming about by ->TCP or ->UDP work with sockets for
addressing. A socket consists of an IP address and of a port (cp. Address:
Street Name and Street Number)
Switch: A device which can connect several machines to the Ethernet. Contrary to a
hub the switch is „intelligent“, i.e. it can memorize the MAC addresses
which are connected to a port and it directs the data traffic in a more effi-
cient way to the individual ports.
TCP: The Transmission Control Protocol is a transport protocol which enables
the data exchange between network devices. It works „connection-
oriented“ which means that the data transmission is secured.
UDP: The User Datagram Protocol is a transport protocol which enables the data
exchange between network devices. It operates „connectionless“, i.e. the
data transmission is unsecured.
URL: The “Uniform Resource Locator” refers to the address at which a service can
be found in the web browser. In this manual the IP address of the MoRoS is
mostly loaded as URL.
VPN: Virtual Private Network: Logical connections (so-called tunnels) are set over
existing unsecured networks. The end points of these connections („tunnel
ends“) and the devices behind can be considered as own logical network. A
very high degree of security of interception and manipulation can be
achieved by encrypting the data transmission via the tunnels and by mutu-
ally authenticating the users of this logical network.
WAN: The Wide Area Network is a network of terminals being a long way away
from each other.