A.
B. NO Usually ICMP sessions (they don't have ESTABLISHED, SYN_SENT and so on states)
C. NO memory_tension_drop=0
D. NO Total number of sessions: session_count=591; TCP: 166+1+3+2=172
when forti receives the syn packet the second digit is 2
it changes to 3 whene forti receives the syn ack packet
after the three-wayhandshek ,the value changes to 1
when a session is closed by both sides, forti keeps that session in the session table for a few seconds more , to allow for any out of order pakets that might arrive after the fin -ACK packet .yhis is state 5 (time wait)
study guide page 92:
FortiGate keeps a session table for a few seconds more in case any out-of-order packets arrive. This is state value 5. State value 5 = TIME_WAIT
=> A
tcp_timewait_timer = a closed session remain in the session table for a few seconds more to allow any out of sequence packet (by default 1sec)
=> A
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