EC-Council
312-50V7 · Question #113
312-50V7 Question #113: Real Exam Question with Answer & Explanation
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Question
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?
Options
- ADenial of Service attacks
- BSession Hijacking attacks
- CWeb page defacement attacks
- DIP spoofing attacks
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