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Cisco Exam 200-201 Topic 5 Question 90 Discussion
Topic #: 5
A user reports difficulties accessing certain external web pages. When an engineer examines traffic to and from the external domain in full packet captures, they notice that many SYNs have the same sequence number, source, and destination IP address, but they have different payloads. What is causing this situation?
TCP injection is an attack where the attacker sends crafted packets into an existing TCP session. These packets appear to be part of the session.
The presence of many SYN packets with the same sequence number, source, and destination IP but different payloads indicates that an attacker might be injecting packets into the session.
This method can be used to disrupt communication, inject malicious commands, or manipulate the data being transmitted.
Understanding TCP Injection Attacks
Analyzing Packet Captures for Injection Attacks
Network Security Monitoring Techniques
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