In this chapter, we looked at the basic networking concepts that you need to know, along with an introduction to Wireshark. Wireshark is a protocol analyzer that is used worldwide by technology professionals to capture and analyze network-level packets.
We also learned about the TCP/IP model. The TCP/IP model has four layers: the application layer, transport layer, network layer, and the link layer. Data is encapsulated as it passes from one layer to another; the resulting packet at the bottom is called a complete PDU.
The TCP is a reliable protocol because acknowledgements are sent as part of its process, whereas the UDP is an unreliable protocol because no acknowledgements are sent.
To install Wireshark, you just need to visit ...
