Question 54

Explanation

Correct Answer: A. Idle scanning Explanation A. The correct answer is idle scanning. Idle scanning is a technique used for network scanning and firewall evasion. It involves using a "zombie system" - a third-party computer with low network activity - to scan a target network for open ports and vulnerabilities. Idle scanning is a stealthy technique because the traffic generated by the scan is less likely to be detected by the target network's security defenses, such as firewalls. However, it can be less reliable than other scanning methods, especially on networks that implement countermeasures to thwart idle scanning. B. Ping scanning: Ping scanning is a technique used to identify active hosts on a network by sending ICMP (Internet Control Message Protocol) echo requests and waiting for replies. This technique is not directly related to firewall evasion, nor does it involve the use of a zombie system with low network activity. Therefore, ping scanning is not the answer to this question. C. Banner grabbing: Banner grabbing is the process of collecting information about a network service, such as its version number and operating system, by examining the banners or headers sent by the service when a connection is made. This technique does not involve the use of a zombie system and is not specifically designed to evade firewalls, so it is not the correct answer to this question. D. Port scanning: Port scanning is a method used to discover open ports and services running on a networked device. While port scanning is related to network security and evasion techniques, it does not specifically involve the use of a zombie system with low network activity, so it is not the answer to this question.