Black Box IT Pro LNA1000A, User Manual

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TunnelVision
Black Box® IT Pro™ User Manual 178
Making a Virtual Network Private
In a conventional private network, your company owns all the routers, all the computers, and
all the phone lines involved. Because the only people using the network are employees, the
network is secure (at least in theory).
The Internet, on the other hand, is connected to any number of businesses and organizations.
As your private data passes through the Internet, it is possible that people may intercept what
you are sending. In order to prevent this from happening, all of the data that passes through a
VPN is encrypted with the strongest encryption technology available: 1024-bit RSA and
128-bit Blowfish algorithms. Such encryption makes it
very difficult to intercept your trans-
missions.
VPN Network Topologies
Topology refers to the shape of a network, or the network's layout. How different nodes in a
network are connected to each other and how they communicate are determined by the net-
work's topology. A VPN allows organizations to interconnect their offices securely. Appli-
Branch
Office
Branch
Office
Branch
Office
Branch
Office
Branch
Office
Head Office
Eth
ern
et
The Internet