1. CSC311 Data Communication & Networking
HOMEWORK
Date: 14/06/2013
CSC311 Data Communication & Networking

2. CSC311 Data Communication & Networking
A signal travels from point A to Point B. At point A, the signal power is 100 watts. At point B, the signal power is 90 watts. What is the attenuation in dB?
The attenuation of a signal is -10 dB. What is the final signal power if it was originally 5 watts?
Data pass through a point at a rate of 100 kilobits every five seconts. What is the throughput?
CSC311 Data Communication & Networking

3. CSC311 Data Communication & Networking
4. If the throughput at the connection between a device and the transmission medium is 5 Kbps, how long does it take to send 100,000 bits out of this device? 5. The light of the sun takes approximately eight minutes to reach the earth. What is the distance between the sun and the earth? (Assume speed of light = 3 * 108 m/s)
CSC311 Data Communication & Networking