Pass the Cisco CyberOps Associate 200-201 Questions and answers with ValidTests

A botnet is a network of compromised computers controlled by an attacker. Botnets are often used to carry out Distributed Denial of Service (DDoS) attacks, where the compromised machines are directed to flood a target with traffic, rendering it inaccessible. References: Cisco Cybersecurity Operations Fundamentals, Module 1: Security Concepts, Lesson 1.3: Common Network Application Operations and Attacks, Topic 1.3.4: Denial-of-Service Attacks

Deep packet inspection (DPI) analyzes the data part (and possibly also the header) of a packet as it passes an inspection point, searching for protocol non-compliance, viruses, spam, intrusions, or defined criteria to decide whether the packet may pass or if it needs to be routed to a different destination. Stateful inspection, on the other hand, tracks the state of active connections and determines which network packets to allow through the firewall. While stateful inspection tracks the state of connections (Layer 4 - transport layer), DPI goes further by examining the payload of the packet (Layer 7 - application layer).

Cisco’s official documentation and cybersecurity courses would explain the differences between deep packet inspection and stateful inspection, including their respective layers of operation.

Wireshark is a widely used network protocol analyzer that supports various capture file formats, including those generated by tcpdump.

The.pcapextension is a standard format for packet capture files and is fully supported by Wireshark.

The file extension or the inclusion of characters such as "-" in the file name does not impact Wireshark's ability to open and read the file.

When the engineer opens thesandboxmatware2022-12-22.pcapsfile in Wireshark, the tool will read the packet capture data, allowing for detailed analysis of network traffic.

References

Cisco Cybersecurity Operations Fundamentals

Wireshark User Guide

tcpdump and libpcap Documentation

When analyzing Wireshark traffic for potential attacks, an engineer should look for patterns that indicate abnormal behavior, such as:

Excessive Requests: A high number of requests over a short period could suggest an attempt to overwhelm the server, known as an HTTP flood.

Status Codes: Repeated 403 Forbidden responses may indicate that the server is rejecting requests due to a security rule being triggered.

Request Types: A mix of GET and POST requests could be used in various attack scenarios, including bandwidth flooding or cache bypassing.

Encryption is challenging to security monitoring because it can be used by threat actors as a method of evasion and obfuscation. Encryption can prevent security devices from inspecting the content or payload of the network traffic, making it difficult to detect malicious activity or signatures. Encryption can also hide the source and destination of the traffic, making it hard to trace the origin or destination of the attack. References: https://learningnetworkstore.cisco.com/on-demand-e-learning/understanding-cisco-cybersecurity-operations-fundamentals-cbrops-v1-0/CSCU-LP-CBROPS-V1-028093.html (Module 4, Lesson 4.1.1)

A host-based intrusion detection system (HIDS) monitors a computer system for suspicious activity by analyzing events occurring within that host. It can detect malicious activities and security policy violations by examining system calls, application logs, file-system modifications (such as rootkit installations), and other host activities. HIDS is an essential component in safeguarding the IT infrastructure against unauthorized access and security breaches.

References := The Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) course material covers the monitoring of alerts and breaches, and the understanding and following of established procedures for response to alerts converted to incidents, which includes the use of host-based intrusion detection systems