Ch13 - Network+ Guide to Networks, 4th Edition Solutions 13...

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Network+ Guide to Networks, 4 th Edition Solutions 13 - 1 Network+ Guide to Networks, 4 th Edition Chapter 13 Solutions Review Questions 1. Which of the following percentages represents the highest availability? a. 99.99% 2. Which of the following is most likely to spread itself by acting as an e-mail attachment? b. worm 3. What characteristic of the IRC protocol makes it an effective way to spread viruses and worms quickly? b. It broadcasts communication from one chat room participant to others. 4. Which of the following techniques does a polymorphic virus employ to make itself more difficult to detect? a. It frequently changes its code characteristics. 5. You have detected the presence of a boot sector virus on your workstation. What is the first step you take to disinfect your machine? c. Boot the workstation from an uninfected, write-protected disk. 6. If your antivirus software uses signature scanning, what must you do to keep its virus- fighting capabilities current? d. Regularly update the antivirus software’s signature database. 7. You receive a message that is a known virus hoax. What should you do about it? a. Ignore and delete the message. 8. Over time, what can electrical line noise do to your system? b. damage circuitry on the system board 9. Approximately how long will an online UPS take to switch its attached devices to battery power? d. no time 10. When purchasing a UPS, you have to match the power needs of your system according to what unit of measure? c. volt-amps 11. Which of the following is the most highly fault-tolerant network topology? c. mesh
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Network+ Guide to Networks, 4 th Edition Solutions 13 - 2 12. What makes SONET a highly fault-tolerant technology? a. It uses dual, fiber-optic rings to connect nodes. 13. Why is simple disk striping not fault-tolerant? b. If one disk fails, data contained on that disk is unavailable. 14. What RAID level uses disk mirroring?
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Ch13 - Network+ Guide to Networks, 4th Edition Solutions 13...

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