Quiz2_Solution_Wed_Afternoon - EE3015 Computer Networks...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
EE3015 Computer Networks Quiz 2 (Solution) Wed. afternoon Semester A, 2010/11 1. (8%)File size= 44.1KHz *16 bits * 180 sec *2 channels= 30 MByte 2. (8%) In parallel transmission, n wires are used to transmit n bits at one time; signals on all wires are synchronized. However, in serial transmission, one bit follow another, so we need only one communication channel rather than n to transmit data between two communication devices. 3. (8%) The dispersion is small and hence higher bit rate can be supported. 4. (8%) CSMA is Carrier Sense Multiple Access. It is used in random access protocols. It means that stations listen to the medium before transmitting- if there is already a transmission going on, they do not transmit. This avoids collisions. CD is Collision Detection. It means that stations can detect a collision while transmission, so that they can stop transmission immediately. This improves efficiency. 5. (9%) a) (3%) The CRC bit pattern is 1. b) (3%) The CRC bit pattern is 0. c) (3%) Even parity check
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6. (15%) a) (10%) 0.3 (1 ) (1 2 ) 0.7 (1 2 ) 0.7 (1 ) 2 Total throughput
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/01/2011 for the course ELECTRICAL EE3015 taught by Professor Albertsun during the Spring '11 term at City University of Hong Kong.

Page1 / 3

Quiz2_Solution_Wed_Afternoon - EE3015 Computer Networks...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online