Question: In the MITM attack code, the attacker tries to modify the packets from A to B . After intercepting such a packet, the attacker makes

In the MITM attack code, the attacker tries to modify the packets from A to B. After intercepting such a packet, the attacker makes a copy of the packet, and then does the following. Why does the attacker have to delete the IP and TCP checksums?
newpkt = IP (bytes (pkt [IP]))
del (newpkt. chksum)
del (newpkt [TCP].chksum)
In the MITM attack code, the attacker tries to modify the

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