Cisco 7100 Series Spezifikationen PDF herunterladen (Seite 24)

Overview of Business Scenarios

Cisco 7100 Series VPN Configuration Guide

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In each scenario, a tunnel is constructed, encryption is applied on the tunnel, and different

trafﬁc types (for example, IP, User Datagram Protocol [UDP], and Transmission Control

Protocol [TCP]) are either permitted or denied access to the tunnel. This controls the level

of access the remote ofﬁce and business partner have to the corporate intranet, and secures

the data exchanged between the sites.

Figure 2-1 Business Scenarios

The intranet VPN business scenario explained in Chapter 3, “Intranet VPN Business

Scenario,” links the corporate headquarters to a remote ofﬁce using connections across the

Internet. Users in the remote ofﬁce are able to access resources as if they were part of the

private corporate intranet.

The extranet VPN business scenario explained in Chapter 4, “Extranet VPN Business

Scenario,” builds on the VPN scenario by linking the same corporate headquarters to a

business partner using connections across the Internet; however, the business partner is

given limited access to the headquarters network—the business partner can access only the

headquarters’ public Web server.

Remote

office

Business

partner

Internet

IPSec tunnel

GRE tunnel

Headquarters

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Cisco 7100 Series Spezifikationen Seite 24