Cisco Updated 200-201 Exam Questions and Answers by bryan

Resource exhaustion is an evasion technique where an attacker overwhelms a system with a high volume of requests from multiple sources. This can cause the system to become overloaded and unable to process legitimate traffic, potentially allowing the attacker to bypass security measures like intrusion detection systems.

References := The answers are based on the knowledge from the Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) course material, which covers various cybersecurity concepts, including file identification methods, application control technologies, firewall utilities, and evasion techniques

The file that is extractable via TCP stream within Wireshark is the one that has the Content-Type header set to application/octet-stream, which indicates binary data. This header is present in frames 7, 14, and 21, which are part of the same TCP stream. The other frames have different Content-Type headers, such as text/html or image/jpeg, which are not extractable as binary files. References := Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) v1.0, Module 3: Network Intrusion Analysis, Lesson 3.2: Analyze Data from Common TCP/IP Protocols, Topic 3.2.3: HTTP

Protocol 41 is used to encapsulate IPv6 packets in IPv4 headers for transmission over an IPv4 network. This is one of the methods to implement IPv6 transition mechanisms for hosts and routers that are located on IPv4 networks. An increase in IPv4 traffic carrying protocol 41 may indicate that some hosts or routers are trying to tunnel IPv6 traffic through an IPv4 network, which could be a legitimate or malicious activity depending on the network policy. References := Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) - Cisco, page 177; [IPv6 Transition Mechanisms for IPv4 Domains]

 A web proxy is the technology used to block a user’s HTTP connection to a malicious site according to configured policy. It acts as an intermediary between users and the internet, enforcing security policies and preventing access to harmful sites by inspecting and managing web traffic.