Suppose Host A sends one segment with sequence number 100 and 4 bytes of data over a TCP connection to Host B. In this same segment the acknowledgement number must be 104. True False

Most IP datagram reassembly algorithms have a timer to avoid having a lost fragment tie up reassembly buffers forever. Suppose that a datagram is fragmented into four fragments. The first three fragments arrive, but the last one is delayed. Eventually, the timer goes off and the three fragments in the receiver's memory are discarded. A little later, the last fragment stumbles in. What should be done with it?

The following event is shown to occur in the figure below illustrating the operation of TCP Reno. For the following prompt, clearly state where it occurs and how we can identify where this event occurs based on the shape of the graph or changes to the congestion window size. a.) A segment loss event due to a timeout.

Host A sends the information of size 3000 bytes to Host B using TCP protocol. As long as Host B receives each packet in size 1000 bytes, Host B must acknowledge Host A. We assume the header size in each packet is 40 bytes, the starting sequence number used by Host A is 1000, and the window size of the sender side is 3000 bytes. What is the value of SND.NXT when the first packet is sent out, but not acknowledged?    1000   2000   3000   1999   If a host is monitored, and there are seven TCP packets captured: {S1, S2, S3, S4, S5, S6, E1}, where Si represents ith Send packet, and Ej represent jth Echo packet. E1 here acknowledges and echoes all the six Send packets cumulatively. Which of the follow matching can make more sense to represent the RTT of the connection chain? E1 matches with S1   E1 matches with S4   E1 matches with S5   E1 matches with S6

CIS269 Packet Translation Lab   Break down the following IP datagram into its individual fields, listing the value of each. Hint:  It’s an IP datagram containing a TCP segment containing another protocol…   45        00        00        31 94        00        40        00 80        06        1B       9F 80        A3       C9       29 D8       45        29        15 04        09        00        15 00        00        C3       A1 DF       65        A8       45 50        18        20        AA 8E       8C       00        00 43        57        44        20 66        75        6E       0D 0A

Suppose we have switches S1 through S4; the forwarding-table destinations are the switches themselves. The tables for S2 and S3 are as below, where the next_hop value is specified in neighbor form: S2: ⟨S1,S1⟩ ⟨S3,S3⟩ ⟨S4,S3⟩ S3: ⟨S1,S2⟩ ⟨S2,S2⟩ ⟨S4,S4⟩ From the above we can conclude that S2 must be directly connected to both S1 and S3 as its table lists them as next_hops; similarly, S3 must be directly connected to S2 and S4. (a). The given tables are consistent with the network diagrammed in exercise 6.0. Are the tables also consistent with a network in which S1 and S4 are not directly connected? If so, give such a network; if not, explain why S1 and S4 must be connected. (b). Now suppose S3’s table is changed to the following. Find a network layout consistent with these tables in which S1 and S4 are not directly connected. Do not add additional switches. S3: ⟨S1,S4⟩ ⟨S2,S2⟩ ⟨S4,S4⟩ While the table for S4 is not given, you may assume that forwarding does work correctly.…

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If a host has received the following segments in TCP:[1, 1000], [4001, 5000], [5001, 6000], [1, 1000]. (1)Show the contents of SACK option to be sent.

If the destination port field of a TCP segment contains the binary number 0000000001010000 what protocol is being used?