1. CCN – revision lecture

2. Exam
2 hours long
3 out of 5 questions (25points each question, maximum 75 points)
Past exams visible via portal (just enter the module code)

3. Module contents and structure
Part 4: applications
Part 3: internetworking
Part 2: packet transmission
Part 1: data transmission

4. Part 1: data transmission
Transmission media;
Local asynchronous communication (RS-232);
Long distance communication (modems and carriers)

5. Part 2: packet transmission
Packets, frames and error detection
Local area networks (LANs)
Hardware addressing
Extending LANS: Fiber Modems, repeaters, bridges and switches;
WAN Technologies and routing
Network ownership and service paradigm
Protocols and layering

6. Part 3: internetworking
Concepts, architecture and protocols
IP addresses
Binding protocol addresses (ARP)
IP Datagrams and datagram forwarding
IP encapsulations, fragmentation and reassembly
The future of IP
TCP (reliable transport service)

7. Part 4: applications Client-server interaction The socket interface
Example applications

8. Feedback Most students attempt questions 1,2 and 3 with mixed results
Least number of student attempt question 5 typically with very good results
Not many students attempt question 4 with mixed results

9. Typical mistakes
Incomplete answers: e.g. giving definitions but not comparisons as in transmission media and bit rate/baud rate questions
Providing diagrams or formulas without explanations (e.g RS-232, modulation, Shannon theorem)
Many incorrect answers usually in the area of routing, next hop and bridges
Vague answers on the questions such as the purpose of routers and TCP protocol stack

10. Any questions?