![]() ![]() ![]() How data changes as each layer provides services to the next layer Data encapsulates Data de-encapsulates Lisa Bockġ3 The OSI Model Data Frame Segment Packet PDU Bits MAC Port IP Addressġ5 Wireshark The tool for this lab is Wiresharkĭownload and install Wireshark Install WinPCap if you are using Windows Lisa Bockġ6 Wireshark For a live capture Launch Wireshark To see all traffic Port monitoring or SPAN Use a full duplex tap in line with traffic Lisa Bockġ1 The OSI Model To understand packet analysis you must understand the encapsulation process Lisa Bockġ2 The OSI Model A seven-layer representation Packet sniffer will see only data going to and from the switch to the capture device Lisa Bockĩ Packet Capture Traffic on a wired switch To see all traffic ![]() Packet analysis uses a packet sniffer Monitor and troubleshoot network traffic As data flows across the network Sniffer captures each packet and decodes the packet's raw bits Showing the field values in the packet according to the appropriate RFC or other specification Lisa BockĪnalyze network problems Detect intrusion attempts Identify network misuse Content monitoring Assess bandwidth utilization Verify endpoint security status Gather network statistics Lisa BockĬain and Abel Carnivore – now NarusInsight dSniff ettercap Ngrep OmniPeek Snoop Tcpdump Lisa BockĨ Packet Capture Dependent on where you capture On a switch Layers and Encapsulation Explore the Wireshark interface Examine Common Protocols TCP, HTTP, DNS, and FTPģ Understand Traffic Capture and Analysis Lisa Bock Pennsylvania College of Technology Monday October 5, :30am - 10:45am Track AF | Level 1 | Atlantic VIĢ Learning Objectives Understand Traffic Capture and Analysis ![]() 1 Packet Analysis Using Wireshark for Beginners 22AF ![]()
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