Netowrk Caes Sutdy

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Network+ Guide to Networks, 6th Edition

Chapter 14 Solutions

Review Questions

1. Which of the following percentages represents the highest availability?

a. 99.99%

b. 0.001%

c. 99%

d. 0.10%

2. Which of the following commands allows you to determine how long your Linux server has been running continuously?

a. show runtime

b. ifconfig up

c. uptime

d. ifconfig avail

3. What characteristic of the IRC protocol makes it an effective way to spread viruses and worms quickly?

a. It does not require users to log on, thus allowing open entry to the server via users' connections.

b. It broadcasts communication from one chat room participant to others.

c. It maintains a registry of all potential users and issues keep-alive transmissions to those users periodically.

d. It relies on multiple servers to provide the IRC service, thus enabling many hosts to become infected at once.

4. You have outsourced your VoIP services to a cloud computing provider that promises 99.99% uptime. However, one day your IP telephone service is unavailable for a ½ hour. If this turns out to be the service’s average downtime per month, what is its actual uptime?

a. 99.96%

b. 99.93%

c. 99.90%

d. 98.99%

5. If your anti-malware software uses signature scanning, what must you do to keep its malware-fighting capabilities current?

a. Purchase new malware signature scanning software every three months.

b. Reinstall the malware-scanning software each month.

c. Manually edit the date in the signature scanning file.

d. Regularly update the anti-malware software's signature database.

6. Which of the following power flaws has the ability to render your server's main circuit board unusable, even after power returns to normal?

a. Surge

b. Brownout

c. Blackout

d. Sag

7. Approximately how long will an online UPS take to switch its attached devices to battery power?

a. 1 minute

b. 30 seconds

c. 5 seconds

d. No time

8. When purchasing a UPS, you have to match...