1. Basic Communications Dr John Cowell phones off (please)

2. Q 1 In MPEG which compression technique is NOT used? a) Huffman coding b) Discrete Cosine Transform (DCT) c) Quantization compression d) Run-length encoding e) Predictive coding CSCI1412-HW-42

3. Q2 What is NOT valid statement about MPEG standards? a) MPEG 4 is used for Blu-Ray encoding b) MPEG encoding achieves compression typically between 25:1 and 50:1 c) MPEG 2 is used for DVD encoding. d) MPEG 1 encoding is designed for coding video at about 1.5MBits/sec e) The audio layer of MPEG3 encoding is called MP3 CSCI1412-HW-43

4. Q3 A company produces computer games has one large building with software engineers using about 200 PCs. What type of network would be most appropriate for them to use? a) Peer to peer b) Internet c) WAN d) LAN e) MAN CSCI1412-HW-44

5. Q4 Which of the following is the main advantage of using a Beowulf cluster a) The computers in the cluster appear to be a single computer. b) The hardware required is cheaper than for a comparable WAN. c) Security is superior to using a LAN. d) Clusters use the three tier architecture model. e) Data transfer is very secure. CSCI1412-HW-45

6. Answers: Q1 – D - Run-length coding is not used. Q2 – E – MP3 is the audio layer of MPEG1. Q3 – D – Local area network for speed and security. Q4 – A – all the computers seem to be one computer. CSCI1412-HW-46