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Troubleshooting Tips: Data
Communications, Networking and
TCP/IPby
Steve Mackay
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Thank You For Your Interest
If you are interested in further training or information, please visit:
http://www.idc-online.com/slideshare
www.eit.edu.au Technology Training that Workswww.idc-online.com/slideshare
Overall Presentation
A quick introduction to troubleshooting industrial data communications systems from cabling & hardware; TCP/IP utilities to protocol analysis.
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Objectives• Basics of
troubleshooting• Focus on TCP/IP Utilities• Introduction to Protocol
analysis
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Topics
• Overall concept• Hardware & Cabling• TCP/IP Utilities• Packet Analysis
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1.0 Introduction
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Overall Concept
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Tools of the trade
• Cable tester• TCP/IP (and other third party) Utilities• Protocol Analyzer (e.g. Wireshark)
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2.0 Hardware & Cabling
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Hardware and Physical Cabling
• Check cable on both sides of connection• Switch lights• Incorrect wire type and components• Straight versus cross over cable• Excessive untwists• Damaged RJ-45 connector• Electrical noise and shielding
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3.0 TCP/IP Utilities
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Utilities• Ping• Arp• Netstat• Nbtstat• Ipconfig• Tracert
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Ping -t• Easiest ways to test connectivity across the network and
confirm that an IP address is reachable
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Arp -a• Displays hardware and IP address mapping
• http://e-spohn.com/blog/2012/05/26/wep-cracking-automated/arp-request-replay/
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Netstat-e• Displays activities since
last reboot• Useful data on any
problems
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Nbtstat• Protocol Stats & TCP/IP connections
• http://www.windowsecurity.com/articles-tutorials/windows_os_security/Profiling-Operating-System-Part4.html
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Ipconfig /all
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Tracert
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4.0 Packet Analysis
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OSI Model
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Packet Structure
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Thank You For Your Interest
If you are interested in further training or information, please visit:
http://www.idc-online.com/slideshare
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