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Glossary
downward compatible. The standard provides for throughput
rates of up to 100 Mbit/s for uploading and downloading, but
requires a distribution network with a more closely meshed
infrastructure—a demand that is hardly economical outside
of major urban areas.
VPN
short for Virtual Private Network
VPN serves to integrate devices from a neighboring network
into your own network, without the networks having to be
compatible with each other.
A VPN is generally an independent company network distrib-
uted over several locations, which uses the infrastructure of a
public communications network to link its partial networks or
to link individual computers to the rest of the network. A VPN
uses tunneling technologies and typically builds on the infra-
structure of the Internet.
Using a Virtual Private Network it is possible to use all net-
work applications of the company network even from distant
locations. This means it is possible to use the advantages of
the network even over large geographical distances.
VPN facilitates optimum information flow without delay
throughout the entire company, even to offices in other loca-
tions. E-mail servers, file sharing and other central applica-
tions of the company network can thus be made available via
VPN even to distant branch offices, subsidiaries and home of-
fices. With VPN, field representatives of a company can also
be granted secure access to the company network.
VoIP
short for for Voice over IP, also known as Internet telephony
Calls from the Internet are possible to and from the fixed-line
network and mobile communications networks. Various Inter-
net service providers and telephony carriers provide SIP-
fixed-line gateways for this purpose. The gateways are used
to produce voice connections between the Internet and
conventional telephone networks.
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