Discussion: TCP (Transport Control Protocol) and UDP (User Datagram Protocol) operate at the Transport layer of the Internet Protocol Hierarchy. They deliver information between Internet applications. To identify the applications running on a host, Internet transport layer uses port numbers, each a sixteen-bit number expressed as a decimal number (e.g. 80). Each host interface on the Internet is uniquely identified by an IP address, a 32-bit number usually expressed in dotted decimal notation (e.g.192.168.1.45). TCP and UDP combine data from multiple applications into a single outgoing connection at a source host. This process is called multiplexing. These protocols, at a destination host, separate data arriving at an incoming connection destined for different applications. This process is called demultiplexing. TCP is connection oriented and has many other features geared towards providing reliable communication, flow control and congestion control. UDP is connectionless and does not have these features. In this lab, you will analyze pre-captured Wireshark files to explore features of TCP and UDP protocols and their differences.
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