GATE | GATE-CS-2015 (Set 1) | Question 65

1. If the sequence number of a segment is m, then the sequence 
   number of the subsequent segment is always m+1.
2. If the estimated round trip time at any given point of time
   is t sec, the value of the retransmission timeout is always
   set to greater than or equal to t sec.
3. The size of the advertised window never changes during the 
   course of the TCP connection.
4. The number of unacknowledged bytes at the sender is always 
   less than or equal to the advertised window 

(A)

(B)

(C)

(D)