Online 200-201 Questions Video

Encryption allows the user to make the data incomprehensible without a specific key, certificate, or password. Encryption is a method of transforming data into a format that only authorized parties can access. Encryption can be used to protect data in transit or at rest from unauthorized access or modification. References: (Module 4, Lesson 4.1.1)

A false positive in network security is when a benign action is incorrectly flagged as malicious, leading to legitimate traffic being blocked. This can disrupt normal network operations and access to services, as the security system mistakenly identifies normal behavior as a threat1.

References := The concept of false positives and their impact on network traffic is discussed in various cybersecurity resources, including Cisco’s own training materials and discussions on network security best practices1.

 In Wireshark, to filter traffic for a specific LAN, the correct syntax uses ip.src== and ip.dst== to specify the source and destination IP addresses. The /16 denotes the subnet mask, indicating that we are interested in the entire 10.11.x.x range. This filter will show all traffic where both the source and destination IP addresses fall within the specified LAN, excluding any internet traffic. References: The information is based on the Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) course, which covers network intrusion analysis and the use of tools like Wireshark for traffic analysis1.

 A host-based firewall is a utility that can block unauthorized access to a computer system, including port scans. It monitors incoming and outgoing network traffic and permits or blocks data packets based on a set of security rules.