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1 vote

Why don't tcp sequence number start from 0?

Apart from what @Zac67 said: Predictability Prevention: If ISN(initial seq numbers) started at 0, attackers could more easily predict future sequence numbers in a connection. This would make it ...
Samratsinh Dodiya's user avatar
1 vote

Can TCP seq number increment after sending a FIN?

As @user3629081 indicated, Sequence Number value increases after every FIN (and also after every SYN) - excluding the cases of TCP retransmissions. This results directly from the definitions of these ...
Wojtek's user avatar
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