The meaning of tunnel in the tunnel model of IPSec is that O the IPSec packets a

Question

The meaning of tunnel in the tunnel model of IPSec is that O the IPSec packets are passing through a secure cable shielded from other traffic. the protected IP packets are inside another IP header (the outer header) and the outer headers of many IP packets can be visualized as making a tunnel wall through which the inner IP packets are passing. the cable is secured so that the IP packets do not need to be secured O IPSec replaces IP and the higher layer protocols' packets (TCL, UDP) are the payload of IPSec instead of IP QUESTION 5 In a VPN, the IP packets secured using IPSec use the same Internet circuits as any other traffic can use. There are no dedicated circuits for IPSec. ?True O False QUESTION 6 Authentication Header (AH) provides the data origin authentication & data integrity, while Encapsulated Security Payload (ESP) does not. O True False QUESTION 7 IKEv2 replaces manual entries of IPSec security associations (SAs) O True False

Explanation / Answer

1. b)

Explanation: IPSec tunnel mode is the default mode. With tunnel mode, the entire original IP packet is protected by IPSec. This means IPSec wraps the original packet, encrypts it, adds a new IP header and sends it to the other side of the VPN tunnel (IPSec peer).

5. False

6. False

Explanation: ESP can be used to provide confidentiality, data origin authentication, connectionless integrity, an anti-replay service (a form of partial sequence integrity), and (limited) traffic flow confidentiality.

7. True

Explanation: The Internet Key Exchange version 2 (IKEv2) Protocol dynamically establishes and maintains a shared state between the end-points of an IP datagram. IKEv2 performs mutual authentication between two parties and establishes the IKEv2 Security Association (SA).

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