Summary
This chapter lays the foundation of basic networking concepts along with an introduction of the Wireshark GUI. Wireshark is a protocol analyzer that is used worldwide by IT professionals to capture and analyze network-level packets.
The TCP/IP model has four layers: the Application Layer, Transport Layer, Network Layer, and Link Layer. Data gets encapsulated as it passes on from one layer to another; the resulting packet at the bottom is called a complete PDU, which actually travels over the channel.
To install Wireshark, you just need to visit http://www.wireshark.org and then download the appropriate version of this open source software. The Wireshark community is governed by real-world geeks; this can be a good source of learning and ...
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