26. The selectors that determine a Security Policy Database are: Name, Local and Remote Ports, Next Layer Protocol, Remote IP Address, and ____
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The SPD is used in network security to define how packets are handled based on specific criteria. Show more…
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3. What lower-layer protocol encapsulates SNMP messages? 4. Because SNMP uses two different port numbers (UDP ports 161 and 162), a single system can easily run both a manager and an agent. What would happen if the same port number were used for both? 5. One of the first steps in configuring a device to be managed is to give it an IP address. Why? 6. What is the disadvantage of having the network management system operate at the application layer?
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Madhur L.
Texts: 4.2 a. Suppose that the current replay window spans from 120 to 530. If the next incoming authenticated packet has sequence number 340, what will the receiver do with the packet, and what will be the parameters of the window after that? (3 Marks) b. If instead the next incoming authenticated packet has sequence number 598, what will the receiver do with the packet, and what will be the parameters of the window after that? (3 Marks) c. If instead the next incoming authenticated packet has sequence number 110, what will the receiver do with the packet, and what will be the parameters of the window after that? (3 Marks) d. The IPsec architecture document states that when two transport mode SAs are bundled to allow both AH and ESP protocols on the same end-to-end flow, only one ordering of security protocols seems appropriate: performing the ESP protocol before performing the AH protocol. Why is this approach recommended rather than authentication before encryption? (3 Marks) e. Where does IPsec reside in a protocol stack? (3 Marks)
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