CEH-001 Exam Dumps : Certified Ethical Hacker (CEH)

A quality that prevents a third party from being able to prove that a communication between two other parties ever took place. This is a desirable quality if you do not want your communications to be traceable.

Non-repudiation is the opposite quality—a third party can prove that a communication between two other parties took place. Non-repudiation is desirable if you want to be able to trace your communications and prove that they occurred. Repudiation – Denial of message submission or delivery.

A SYN attack occurs when an attacker exploits the use of the buffer space during a Transmission Control Protocol (TCP) session initialization handshake.The attacker floods the target system's small "in-process" queue with connection requests, but it does not respond when a target system replies to those requests.This causes the target system to time out while waiting for the proper response, which makes the system crash or become unusable.