Lancom-systems LCOS 3.50 Manual de usuario descargar pdf (Pagina 292)

LANCOM Reference Manual LCOS 3.50  Chapter 14: Virtual Private Networks—VPN

292

Virtual Private Networks—

VPN

 The central LAN has a connection to the Internet so that its users can

access the Web, and send and receive e-mail.

All connections to the outside world are based on dedicated lines, i.e.

switched or leased lines. Dedicated lines are very reliable and secure. On the

other hand, they involve high costs. In general, the costs for dedicated lines

are dependent on the distance. Especially in the case of long-distance

connections, keeping an eye out of cost-effective alternatives can be

worthwhile.

The appropriate hardware must be available in the headquarters for every

type of required connection (analog dial-up, ISDN, leased lines). In addition

to the original investment costs, ongoing costs are also incurred for the

administration and maintenance of this equipment.

Networking via the Internet

The following structure results when using the Internet instead of direct

connections:

All participants have fixed or dial-up connections to the Internet. Expensive

dedicated lines are no longer needed.

 All that is required is the Internet connection of the LAN in the

headquarters. Special switching devices or routers for dedicated lines to

individual participants are superfluous.

Headquarters

Computers using remote access

Internet







LAN

Branch office

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Lancom-systems LCOS 3.50 Manual de usuario Pagina 292