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Q. Show VPNs Security and the Internet Model?
- VPN's Security and the Internet Model
- Application layer - provide for each application protocol (other layers may be left vulnerable)
- Transport layer - difficult to change existing protocols
- Network layer - IPsec (additional security for IP)
- Data Link layer - does not provide end-to-end security
Session layer protocols consists of NFS, SQL, RPC, Appletalk Session Protocol (ASP), XWindows, and NetBEUI.
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By entering a 16 as the hop count, the other routers recognize that the destination is unreachable.
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