Network + Guide to Networking Chapter Three

Review Questions Chapter 3

1. What is different about the method used to boost a digital signal’s strength, compared with the method of boosting an analog signal’s strength? A digital signal requires a repeater, which retransmits the signal in its original form, and an analog signal requires an amplifier, which increases the strength of both the signal and the noise it has accumulated.

2. Which of the following decimal numbers corresponds to the binary number 00001001? 9.

3. A wave with which of the following frequencies would have the longest wavelength? 10 MHz.

4. Ethernet relies on which of the following transmission types? Half Duplex.

5. In wavelength division multiplexing, two modulated signals are guaranteed to differ in what characteristic? Phase.

6. Which of the following can increase latency on a network? Adding 50 meters to the length of the network.

7. What part of a cable protects it against environmental damage? Sheath.

8. You are helping to install a cable broadband system in your friend’s home. She wants to bring the signal from where the service provider’s cable enters the house to a room on another floor, which means you have to attach a new cable to the existing one. What type of cable should this be? RG-6.

9. With everything else being equal, a network using which of the following UTP types will suffer the most cross talk? CAT-3.

10. Which of the following is not a source of EMI? Megaphone.

11. Which of the following network transmission media offers the highest potential throughput over the longest distances? SMF.

12. In which of the following network links might you use MT-RJ connectors? A fiber-optic connection between a server and router.

13. Fiber-optic cable networks can span much longer distances that copper-based networks before requiring repeaters because: they are resistant to noise such as EMI.

14. What is the purpose of cladding in a fiber-optic cable? It reflects the signal...