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Virtual
Private Network VPN Solution
The world has
changed a lot in the last couple of decades. Instead of simply
dealing with local or regional concerns, many businesses now
have to think about global markets and logistics. Many
companies have facilities spread out across the country or
around the world, and there is one thing that all of them
need: A way to maintain fast, secure and reliable
communications wherever their offices are.
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Until fairly
recently, this has meant the use of leased lines to
maintain a wide area network (WAN). Leased lines,
ranging from ISDN (integrated services digital network, 128
Kbps) to OC3 (Optical Carrier-3, 155 Mbps) fiber, provided a
company with a way to expand its private network beyond its
immediate geographic area. A WAN had obvious advantages over a
public network like the Internet when it came to reliability,
performance and security. But maintaining a WAN, particularly
when using leased lines, can become quite expensive and often
rises in cost as the distance between the offices increases.
As the popularity
of the Internet grew, businesses turned to it as a means of
extending their own networks. First came intranets,
which are password-protected sites designed for use only by
company employees. |
Now, many companies are creating their own VPN
(virtual private network) to accommodate the needs of
remote employees and distant offices.
A well designed VPN can
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1.
Extend geographic connectivity
2.
Improve security
3.
Reduce operational costs versus traditional WAN
4.
Reduce transit time and transportation costs for remote
users
5.
Improve productivity
6.
Simplify network topology |
7.
Provide global networking opportunities
8.
Provide telecommuter support
9.
Provide broadband networking compatibility
10.
Provide faster ROI (return on investment) than
traditional WAN |
A
well designed VPN must also incorporate Security,
Reliability, Scalability,
Network management, Policy
management.
Remote
Access VPN
There
are two common types of VPN. Remote-access, also called
a virtual private dial-up network (VPDN), is a
user-to-LAN connection used by a company that has employees
who need to connect to the private network from various remote
locations. Typically, a corporation that wishes to set up a
large remote-access VPN will outsource to an enterprise
service provider (ESP). The ESP sets up a network
access server (NAS) and provides the remote users
with desktop client software for their computers. The
telecommuters can then dial a toll-free number to reach the
NAS and use their VPN client software to access the corporate
network
Site-to-Site
VPN
Through the use of dedicated equipment and large-scale
encryption, a company can connect multiple fixed sites over a
public network such as the Internet. Site-to-site VPNs can be
one of two types:
Intranet-based
- If a company has one or more remote locations that they wish
to join in a single private network, they can create an
intranet VPN to connect LAN to LAN.
Extranet-based
- When a company has a close relationship with another company
(for example, a partner, supplier or customer), they can build
an extranet VPN that connects LAN to LAN, and that allows all
of the various companies to work in a shared environment.
You may come
and visit us to discuss matters pertaining to your
requirement, call or email us using the information provided
on the left side of the page.
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