Introduction to the lecture on addressing in computer networks with an overview of session outcomes.

• The lecture aims to explain networking addressing in a practical manner.
• Outcomes include understanding port, IP, and MAC addressing with examples.

Detailed explanation of port addressing and the data transmission process from sender to receiver.

• Discussed the role of port numbers in identifying the source and destination processes within computers.
• Outlined how application data is passed down through layers, with port numbers added at the transport layer.
• Explained the encapsulation process where IP addresses and MAC addresses are added at network and data link layers respectively.

Explanation of how IP and MAC addressing facilitate the routing of packets through a network.

• Described how IP addressing is utilized for routing packets between networks.
• Showed that MAC addressing is used for local delivery within networks and changes at each hop.
• Reinforced the concept that communication is based on IP or names, not MAC addresses, with the network handling MAC address resolution.

Concluding the lecture with an emphasis on the role of intermediary devices in processing network information.

• Summarized the process of how intermediary devices handle physical, data link, and network layer information.
• Highlighted the constant change of MAC addresses at each hop, in contrast to IP addresses which remain unchanged end-to-end.