Abstract

Abstract. Ethernet connections, which are widely used in many computer networks, can suffer from electromagnetic interference. Typically, a degradation of the data transmission rate can be perceived as electromagnetic disturbances lead to corruption of data frames on the network media. In this paper a software-based measuring method is presented, which allows a direct assessment of the effects on the link layer. The results can directly be linked to the physical interaction without the influence of software related effects on higher protocol layers. This gives a simple tool for a quantitative analysis of the disturbance of an Ethernet connection based on time domain data. An example is shown, how the data can be used for further investigation of mechanisms and detection of intentional electromagnetic attacks.

Highlights

  • Ethernet following the IEEE 802.3 standard (IEEE Standard Association, 2012) is a technique, which is used in many network environments

  • It was shown that interference from high-power electromagnetics (HPEM) can have a dramatic impact on data transmissions over Ethernet networks

  • If a data packet gets lost or the data gets corrupted within an user datagram protocol (UDP) connection, there will be no way to detect and handle this on protocol level as opposed to transmission control protocol (TCP)

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Summary

Introduction

Ethernet following the IEEE 802.3 standard (IEEE Standard Association, 2012) is a technique, which is used in many network environments. At least the lowest level in big network installations is usually realised with CAT5e copper twisted pair lines for signal transmission This enables for data transmission using the variant 1000BASE-T, which is known as Gigabit Ethernet. It will be shown that a practical software implementation of a new test method gives a finely granulated time resolution of Ethernet frames and disturbances on the physical layer. This data can be used for further analysis to detect IEMI. This new method allows for testing network equipment with comparable results independently from user applications and specific software environments

Error mechanisms in classical TCP based communication
Design of a new test method
Testing procedure
Implementation
Measuring data transmission rate
Measuring of packet losses
Findings
Conclusions
Full Text
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