2. ICC Module 3 Lesson 4 – Networking 1 / 4 © 2015 Ph. Janson Information, Computing & Communication Networking – Clip 0 – Introduction School of Computer Science & Communications Ph. Janson

3. ICC Module 3 Lesson 4 – Networking 2 / 4 © 2015 Ph. Janson Where are we? Storage = transmission across time Communication = transmission across space Memory I/O Processor Ctrl/Addr/Memory bus Memory I/O Processor Ctrl/Addr/Memory bus Back-end Front-end “Von Neumann” computers Front-end Back-end

4. ICC Module 3 Lesson 4 – Networking 3 / 4 © 2015 Ph. Janson The role of computer networks At the same time similar to and dual of the role of storage ►Storage determines  Where and how data get stored so one can retrieve them later in time? timespace  When and how data get sent so one can receive them elsewhere in space? ►Is the raison d’être of networking Notice the time-space duality of these two functions

5. ICC Module 3 Lesson 4 – Networking 4 / 4 © 2015 Ph. Janson Outline ►Computer communication basics  Clip 1 – Protocols & messages Clip 1  Clip 2 – Protocol layers Clip 2  Clip 3 – Protocol encapsulation Clip 3  Clip 4 – Switching Clip 4 ►Internet basics  Clip 5 – Internet topology & layering Clip 5  Clip 6 – Internet addressing & routing Clip 6  Clip 7 – Internet route calculation Clip 7  Clip 8 – Internet protocols Clip 8 ►Computer network paradigms  Clip 9 – Network paradigms Clip 9