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Networking Requirements
On a network shown in Figure 18-2, AR router RouterA functions as the branch gateway and Cisco router RouterB functions as the headquarters gateway. They communicate over the Internet.
The enterprise wants to protect traffic transmitted over the Internet between the enterprise branch and headquarters. An IPSec tunnel can be established between the headquarters gateway and branch gateway to protect communication between the headquarters and branch over the Internet. If a large amount of data flows need to be protected by IPSec, it is recommended that the IPSec tunnel be established using virtual tunnel (VT) interfaces. There is no need to create ACL rules to define traffic characteristics to be protected.
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