The packets listed below were received by your network's stateful firewall, and they are shown in the following table in random order. The IP addresses of two hosts in your LAN, IP1 and IP2, and two external hosts, IP3 and IP4, are assumed to be IP1 and IP2, respectively. Indicate the number of established sessions and the number of half-formed sessions by evaluating these packets. established sessions. Packet Direction Pa1 Pa2 Pa3 Pa4 Pa5 Pa6 Pa7 Pa8 Pa9 out Out in Out In In out out In Source IP IP1 IP2 IP3 IP2 IP4 IP4 IP2 IP1 IP4 Dest. IP Source Dest. Port Port 23 y X IP3 IP4 IP1 IP4 IP2 IP2 IP4 IP3 IP2 X 25 23 25 y y 80 x n y 25 25 n 23 80 SYN 1 1 1 0 1 0 1 0 1 ACK 0 1 1 1 0 1 1 1 0 The number of established sessions-2 & The number of half established sessions - 1 O The number of established sessions-0 & The number of half established sessions - 3 O The number of established sessions-2 & The number of half established sessions - 2

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