112-51 Exam Questions & Answers

A coaxial cable is a type of network cable that is made up of a single copper conductor at its center and a plastic layer that provides an insulated center conductor with a braided metal shield. The metal shield helps to reduce electromagnetic interference and noise from external sources. Coaxial cables are commonly used for cable TV, radio, and broadband internet connections12. Reference: Different Types of Network Cable and Specifications, Network Defense Essentials - EC-Council Learning

One of the most basic and important security guidelines for laptop users is to always log off or lock the system when unattended. This prevents unauthorized access to the system and the data stored on it by anyone who might have physical access to the laptop. Logging off or locking the system requires a password or other authentication method to resume the session, which adds a layer of protection to the laptop. Johana failed to comply with this security guideline, as she left the system active with the project file open and went for a coffee break, allowing Bob to access her system and modify the project file. Reference:

Ten simple steps for keeping your laptop secure - Step 1: Require a password when logging in

6 Steps to Practice Strong Laptop Security - Step #1: Set complex passwords where it counts

A Practical Guide to Securing Your Windows PC - Section: Lock your computer when you step away

The Sarbanes-Oxley Act (SOX) is a US law that was enacted in 2002 in response to the corporate scandals involving Enron, WorldCom, and others. The SOX aims to protect the public and investors by increasing the accuracy and reliability of corporate disclosures, such as financial statements, audit reports, and internal controls. The SOX also establishes the Public Company Accounting Oversight Board (PCAOB) to oversee the auditing of public companies and imposes criminal penalties for fraud and non-compliance12. Reference: Network Defense Essentials - EC-Council Learning, Sarbanes-Oxley Act of 2002 (SOX) | U.S. Department of Labor

Anomaly-based IDS is a type of IDS that detects intrusions by comparing the observed network events with a baseline of normal behavior and identifying any deviation from it. Anomaly-based IDS can detect unknown or zero-day attacks that do not match any known signature, but they can also generate false positives due to legitimate changes in network behavior. Anomaly-based IDS can use various techniques to model the normal behavior, such as statistical analysis, machine learning, or artificial intelligence. Anomaly-based IDS is the type of IDS employed by Messy in the above scenario, as he deployed an IDS that depends on observing and comparing the observed events with the normal behavior and then detecting any deviation from it. Reference:

Anomaly-Based Intrusion Detection System - Chapter 2: Anomaly-Based Intrusion Detection System

Network Defense Essentials (NDE) | Coursera - Week 10: Intrusion Detection and Prevention Systems

A systematic literature review for network intrusion detection system (IDS) - Section 3.2: Anomaly-based IDS