The Blog Channel

 Objectives Part 1: Analyze the Ethernet II Frame's Header Fields Part 2: Capturing and Analyzing Ethernet Frames Using Wireshark Context / Scenario When protocols at the upper layers communicate, data flows down the Open Systems Interconnection (OSI) layers and is encapsulated in a Layer 2 frame. The frame composition is determined by the mode of media access. For instance, if the upper layer protocols are TCP and IP and the media access layer protocol is Ethernet, the Layer 2 frame encapsulation will be Ethernet II. This is standard behaviour in a LAN environment. It is beneficial to analyse frame header information when learning about Layer 2 concepts. You will review the fields contained in an Ethernet II frame in the first section of this lab. In Part 2, you'll capture and analyse Ethernet II frame header fields for local and remote traffic using Wireshark. Note from the instructor: This lab assumes the student is using a personal computer with internet access. Additionall...

 Objectives Part 1: Using Wireshark to Capture and Analyze Local ICMP Data Part 2: Using Wireshark to Capture and Analyze Remote ICMP Data Context / Scenario Wireshark is a protocol analyzer software tool, sometimes known as a "packet sniffer," that is used for network troubleshooting, analysis, software and protocol development, and teaching. As data streams traverse the network, the sniffer "captures" each protocol data unit (PDU) and is able to decode and analyse its contents in accordance with the relevant RFC or other standard. Wireshark is an essential tool for anybody who works with networks and may be used in conjunction with the majority of the labs in the CCNA courses for data analysis and troubleshooting. Wireshark will be used to collect ICMP data packet IP addresses and Ethernet frame MAC addresses in this experiment. Ressources Required 1 personal computer (Windows with internet access) Additional personal computers (PCs) connected to a local area netw...

 3.7.9 Lab – Wireshark Installation Objectives Install Wireshark Context / Scenario Wireshark is a protocol analyzer software tool, sometimes known as a "packet sniffer," that is used for network troubleshooting, analysis, software and protocol development, and teaching. As data streams traverse the network, the sniffer "captures" each protocol data unit (PDU) and is able to decode and analyse its content in accordance with the relevant RFC or other standard. Wireshark is an essential tool for anybody who works with networks and may be used in conjunction with the majority of the labs in the CCNA courses for data analysis and troubleshooting. This experiment demonstrates how to download and install Wireshark. Ressources Required 1 personal computer (Windows with internet access) Instructor Note: Using a packet sniffer such as Wireshark may be seen as a violation of the school's security policy. Permission should be sought prior to running Wireshark for this lab....