1. COMP2330 Subject Review

2. Final Exam  Time: 14:45-16:45, 4 May 2010  Venue: SHALL  6 questions  8 pages  2 hours  20% percent (programming)  distributed among all chapters

3. Course Structure  General concepts  Network programming Internetworking and TCP/IP Socket programming basics Client-server design  Principles of computer communications Physical layer Data link layer  Standardized networks Ethernet Wireless Ethernet (WiFi) Network layer

4. Physical Layer (Cont.)  Encoding / Modulation Digital data, digital signal Digital data, analog signal Analog data, digital signal Analog data, analog signal

5. Physical Layer (Cont.)  Multiplexing FDM  WDM TDM  Synchronous TDM  Statistical TDM

6. Data Link Layer Framing Error type Error control  Error detection: Parity check, CRC  Error correction: Hamming Distance (block code) or ARQ Flow control  Stop and wait  Sliding window ARQ  Stop and wait  Go back N  Selective reject

7. Data Link Layer (Cont.)  Local Area Network Different topologies Bus, hub, bridge, switch IEEE 802 protocol architecture  Data link layer is divided into two sub- layers: LLC and MAC

8. Data Link Layer (Cont.)  IEEE 802.3 ALOHA, slotted ALOHA, CSMA MAC: CSMA/CD  IEEE 802.11 Architecture MAC: CSMA/CA Hidden Terminal

9. Network Layer  Circuit Switching  Packet Switching Datagram Virtual circuit  Routing Different routing strategies Least-cost routing algorithms (Dijkstra’s algorithm and Bellman-Ford algorithm)

10. Consultation Hours of Dr. Chu  15:00-17:00 24 April 2010  10:00-12:00 3 May 2010  15:00-18:00 3 May 2010

11. Consultation Hours of Dr. Liu  14:00-16:00 30 April 2010  10:00-12:00 3 May 2010  15:00-18:00 3 May 2010