Glossary
151
If all packets that cannot be delivered in a local network al-
ways are to be transmitted to their given recipients via the
same gateway, for this purpose the address of the gateway
must be saved as the default gateway in the network settings
of the computer.
If a router is used for the shared Internet access in a local net-
work, the IP address of the router must be entered as the de-
fault gateway in the TCP/IP settings of each computer that
wishes to use the Internet connection.
hub
A hub is a device that is used to connect network devices to
each other, for instance through an Ethernet. Network devices
are connected to each other in a star network, with each net-
work device connected to the hub. There are no direct con-
nections between the network devices.
A hub can either send or receive data. Received data are sent
to all connected devices. All connected devices share the da-
ta throughput.
Internet telephony
VoIP (
IP
short for Internet Protocol
The IP Internet Protocol is the most important basic protocol
for the control of data exchange in local networks and in the
Internet. The Internet protocol works without a connection; in
other words, data packets are transmitted from the sender to
the recipient without previous consultation. The addresses of
the recipient and the sender in the data packets are given as
IP addresses.
IPv4
short for Internet Protocol version 4
IPv4 is currently the conventional Internet protocol.
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