|  | | The VPN technology
1. Underlying technologies
2. IPSec protocols
3. More on ISAKMP
4. Leased lines and L2TP
5. L2TP security I
6. L2TP security II
7. IPSec's interactions I
8. IPSec's interactions II
9. IPSec's interactions III
10. Network layer versus application layer I
11. Network layer versus application layer II
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