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CCN – revision lecture

CCN – revision lecture. 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). Module contents and structure. Part 4: applications. Part 3: internetworking. Part 2: packet transmission.

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CCN – revision lecture

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  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?

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