4. Assume a TCP connection is setup between hosts A and B. At some point in time we capture the following exchange of segments: first; host A -> B, Seq. # = 148, Ack # = 211, header length = 20, rwnd = 4000; then a response from host B -> A, Seq #= 212, ACK# = 248, header length = 20, rwnd = 2000. Is there a mistake in any of the field values of these segments? Why? (12 pts.)

Consider this data sequence: "3 11 5 5 5 2 4 6 6 7 3 -8". any value that is the same as the immediately preceding value is considered a consecutive duplicate. in this example, there are three such consecutive duplicates: the 2nd and 3rd 5s and the second 6. note that the last 3 is not a consecutive duplicate because it was preceded by a 7. write some code that uses a loop to read such a sequence of non-negative integers , terminated by a negative number. when the code finishes executing, the number of consecutive duplicates encountered is printed. in this case, 3 would be printed. assume the availability of a variable, stdin, that references a scanner object associated with standard input. that is, stdin = new scanner(system. in); is given.

Given int variables k and total that have already been declared, use a while loop to compute the sum of the squares of the first 50 counting numbers, and store this value in total. thus your code should put 11 + 22 + 33 + + 4949 + 50*50 into total. use no variables other than k and total.

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