Craig W Macey NT 1210 – Intro to Networking Unit 4 Assignment 1: Physical Layer Network Concepts 1. You have created a simple electrical circuit with a battery, wires and a light bulb. Which of the following is true about this circuit? b. The battery's positive lead pulls current toward the lead. c. The circuit creates a direct current. 2. A PC NIC and a switch port create one electrical circuit to use when sending data. The sender creates a (maximum) 1-volt electrical signal with a frequency of 1000 hertz. Which of the following facts are also true? a. The period is 1/1000 of a second. c. The amplitude changes over time. 3. A PC NIC and a switch port create one electrical circuit to use when sending data from the PC to the switch. Which of the following tasks is a function done by the transmitter? b. Senses current on the circuit. d. Removes noise from the circuit. 4. A PC NIC and a switch port create one electrical circuit to use when sending data from the PC to the switch. The transmitter uses a simple encoding scheme that uses a higher amplitude to encode 1 and a lower amplitude to encode 0, sending 1 bit in each bit time. The bit rate is 2000 bits per second (2000 bps). Which of the following is true on this circuit? a. The bit time is .001 seconds.
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