112-51 Exam Dumps : Network Defense Essentials (NDE) Exam

A false positive alert is a type of IDS alert that occurs when the IDS mistakenly identifies benign or normal traffic as malicious or suspicious, and triggers an alarm, although there is no active attack in progress. A false positive alert can be caused by various factors, such as misconfigured IDS rules, outdated signatures, network anomalies, or legitimate traffic that resembles attack patterns. A false positive alert can waste the time and resources of the security team, as they have to investigate and verify the alert, and also reduce the trust and confidence in the IDS. A false positive alert can be reduced by tuning and updating the IDS, filtering out irrelevant traffic, and using multiple detection methods. A false positive alert is the type of IDS alert Jay has received in the above scenario, as he received an event triggered as an alarm, although there is no active attack in progress.References:

• False Positive Alert- Week 10: Intrusion Detection and Prevention Systems
• What is a False Positive in Cybersecurity?
• How to Reduce False Positives in Intrusion Detection Systems

FTP traffic does not provide encryption in the data transfer process, and the data transfer between the sender and receiver is in plain text. FTP stands for File Transfer Protocol, and it is a standard network protocol for transferring files between a client and a server over a TCP/IP network. FTP uses two separate channels for communication: a control channel for sending commands and receiving responses, and a data channel for transferring files. However, FTP does not encrypt any of the data that is sent or received over these channels, which means that anyone who can intercept the network traffic can read or modify the contents of the files, as well as the usernames and passwords used for authentication. This poses a serious security risk for the confidentiality, integrity, and availability of the data and the systems involved in the file transfer. Therefore, FTP is not a secure way to transfer sensitive or confidential data over the network.References:

• Network Defense Essentials Courseware, EC-Council, 2020, pp. 3-31 to 3-32
• What is FTP, and Why Does It Matter in 2021?, Kinsta, January 4, 2021
• FTP Security, Wikipedia, February 9, 2021

The IDS component that analyzes the traffic and reports if any suspicious activity is detected is the network sensor. A network sensor is a device or software application that is deployed at a strategic point or points within the network to monitor and capture the network traffic to and from all devices on the network. A network sensor can operate in one of two modes: promiscuous or inline. In promiscuous mode, the network sensor passively listens to the network traffic and copies the packets for analysis. In inline mode, the network sensor actively intercepts and filters the network traffic and can block or modify the packets based on predefined rules. A network sensor analyzes the network traffic using various detection methods, such as signature-based, anomaly-based, or reputation-based, and compares the traffic patterns with a database of attack signatures or a model of normal behavior. If the network sensor detects any suspicious or malicious activity, such as a reconnaissance scan, an unauthorized access attempt, or a denial-of-service attack, it generates an alert and reports it to the IDS manager or the operator.A network sensor can also integrate with a response system to take appropriate actions, such as logging, notifying, or blocking, in response to the detected activity123.References:

• Network Defense Essentials Courseware, EC-Council, 2020, pp. 3-33 to 3-34
• Intrusion Detection System (IDS) - GeeksforGeeks, GeeksforGeeks, 2020
• Intrusion detection system - Wikipedia, Wikipedia, March 16, 2021