Bay Networks Baystream 7 Instrukcja Użytkownika Pobierz pdf (Strona 4)

One of the fastest growing areas of the

networking industry is remote access to

virtual private networks (VPNs).Driven by

the boom in inexpensive Internet access

and by increasing use of remote access

to corporate networks, dial-up access to

corporate networks over the public IP

infrastructure makes access to network

resources less expensive, more efficient,and

more secure for corporations.As switching

solutions are introduced to alleviate Internet

backbone congestion,Internet users and

corporations look to the Internet as a viable

remote access highway.For ISPs, telephone

companies,and cable operators,Dial VPN

services are both a growing revenue base

and a differentiator in the competitive

telecommunications industry.

Traditionally,VPNs were provided in the form

of broadband packet switched services such

as Frame Relay or X.25.Now,with the advent

of the Internet as a viable service infrastruc-

ture, it is possible to run VPN services over

an alternative protocol — IP.And,while

traditional VPNs are very useful for LAN-to-

LAN connectivity,they do not easily accom-

modate individual users whose only access

to the outside world is in the form of their

PC, a modem,and the public switched

telephone network (PSTN). VPNs that run

over IP are easily accessed by these users.

When network trade publications and

analysts address VPNs,focus is typically on

alternate tunneling protocols.Tunneling,

however,is only one of the key issues

important in deploying VPNs.Network

security and network management are

both vitally important in implementing

VPNs successfully.

What exactly is a VPN? A VPN is a service that

appears to users as if they were connected

directly to their private network,yet the

service actually uses a public infrastructure

to facilitate the connection.

This paper descri bes the market for Dial V P Ns

and the applications for which they are best

suited.It also provides perspective on the

technologies that make Dial VPNs possible.

The paper cites key issues that service

providers should consider when deploying

VPN services.A checklist is included to help

customers choose a Dial VPN vendor.Last is

a discussion of VPN market trends.

Introduction

White Paper Understanding and Implementing Dial VPN Services 3

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