EC0-350 Web TestEngine demo

Exit VCEDump EC0-350 Ethical Hacking And Countermeasures (CEH)
Question 22 of 100
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Q22 Single choice

After a client sends a connection request (SYN) packet to the server, the server will respond (SYN-ACK) with a sequence number of its choosing, which then must be acknowledged (ACK) by the client. This
sequence number is predictable; the attack connects to a service first with its own IP address, records the sequence number chosen, and then opens a second connection from a forged IP address. The attack doesn't see the SYN-ACK (or any other packet) from the server, but can guess the correct responses. If the source IP address is used for authentication, then the attacker can use the one-sided communication to break into the server.

What attacks can you successfully launch against a server using the above technique?

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