Cisco Certified Internetwork Expert (CCIE) Practice Test

Which IOS feature prevents header attacks using packet-header information?

1. LLQ

2. TOS

3. FPM

4. CAR

The correct answer is: FPM

The function that prevents header attacks utilizing packet-header information is known as Flow Performance Management (FPM). This feature is designed to enhance the security of network operations by providing mechanisms to monitor and manage the integrity of packet headers. FPM employs various techniques to inspect and validate header information, helping to identify and mitigate attempts at header manipulation that could lead to security vulnerabilities, such as spoofing or routing attacks. It plays a crucial role in maintaining the overall reliability and security of the network by ensuring that the data being transmitted conforms to expected standards. In contrast, the other choices address different aspects of network management or Quality of Service (QoS). Low Latency Queuing (LLQ) is focused on prioritizing time-sensitive traffic but does not directly provide protection against header attacks. Type of Service (TOS) is a feature related to packet classification and prioritization but also lacks specific mechanisms for header attack prevention. Committed Access Rate (CAR) is used for traffic shaping and rate limiting but does not encompass security measures against header manipulation. Hence, FPM stands out as the appropriate choice for addressing header attacks in packet information.