Question 28 RTP adds \_\_\_\_\_\_ to UDP. O security O Neither security nor sequence numbers O sequence numbers O Both security and sequence numbers
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It is a network protocol used for delivering audio and video over the internet. UDP stands for User Datagram Protocol. It is a connectionless protocol that provides a simple way to send data packets over a network. Show more…
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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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When responding to a SYN packet, what is the value of the sequence number? A. An initial value of 0 B. A random 16-bit integer C. A random 32-bit integer D. The received Sequence Number plus 1
An IPv4 datagram (identification #450) with 1600 bytes of application data encounters a router which has a 420-byte MTU. Assume the minimum IP and TCP header sizes, i.e., the IP header is 20 bytes and the TCP header is 20 bytes. 1) How many fragments are generated? A. 3 B. 4 C. 5 D. 6 E. none of these 2) What is the identification number on the last fragment? A. 451 B. 452 C. 453 D. 454 E. none of these 3) How many bytes of application data are carried in the second fragment? A. 360 B. 380 C. 400 D. 420 E. none of these
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