Virtual Private Networks or VPNs allow corporate
enterprises to extend access to their internal networks to external
employees and partners over standard Internet public networks. The primary
reason VPNs came to be was the immensely expensive lease line solutions. An
enterprise had to have a physically closed network connection between its
partners and remote employees, either through dial-up RAS (Remote Access
Server) solutions into the enterprise network, or lease fractional T1 type
connections between remote offices and partners.
VPNs are the enabling technology which allows clients
(employees) and partners to use standard public Internet ISPs and high-speed
lines to access closed private networks. A common misconception is that VPNs
are always IPSec protocol solutions. In fact, there are many encryption and
security protocols which offer the functionality of a VPN. SSL is one such
Array employs a defense in-depth approach to security
with a multi-layer SSL firewall built on Array’s proprietary SpeedStackTM
which is a networking architecture where every single flow (associated
stream of packets) is inspected in both directions. Inspection of packets is
done at multiple layers of the OSI stack. However, the beauty of the
architecture lies in the underlying implementation where no data is ever
copied or otherwise moved around, and all duplication of work is eliminated.
If a certain piece of work has already been done at a certain layer and the
information is required for a subsequent piece of work at a different layer,
the information is made available without the second layer needing to repeat
the same work.
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