Chapter 14-Ensuring Integrity and Availablity

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

 99.99%

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

 uptime

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

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

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

 99.93%

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

 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?

 Surge

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

 No time

8. When purchasing a UPS, you have to match the power needs of your system according to what unit of measure?

 Volt Amp (VA)

9. What makes SONET a highly fault-tolerant technology?

 It relies on a dual fiber-optic ring for its transmission.

10. Which of the following allows two interfaces on a switch to share the burden of receiving and transmitting traffic over a single logical connection?

 Link Aggregation

11. Suppose you want to use redundant firewalls on your WAN link. Which of the following protocols would allow you to make both firewalls respond to requests for the same IP address?

 CARP-Common Address Redundancy Protocol

12. Which of the following can be considered an advantage of clustering servers over mirroring servers?

 Clustering failover takes place more rapidly.

13. Which of the following...