Chapter 14 review questions

Question 1

Which of the following percentages represents the highest availability?
a. 99.99%
b. 0.001%
c. 99%
d. 0.10%

Answer 1

a. 99.99%

Question 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

Answer 2

c. uptime

Question 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.

Answer 3

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

Question 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 half
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%

Answer 4

b. 99.93%

Question 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.

Answer 5

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

Question 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

Answer 6

a. Surge

Question 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

Answer 7

d. No time

Question 8

When purchasing a UPS, you have to match the power needs of your system according
to what unit of measure?
a. Hertz
b. Volt-amps
c. Watts
d. Mbps or Gbps

Answer 8

b. Volt-amps

Question 9

What makes SONET a highly fault-tolerant technology?
a. It requires high-speed backup lines for every connectivity device.
b. It connects customers with multiple network service providers.
c. It uses single-mode, rather than multimode, fiber-optic cable.
d. It uses dual fiber-optic rings to connect nodes.

Answer 9

d. It uses dual fiber-optic rings to connect nodes.

Question 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?
a. Round-robin DNS
b. Link aggregation
c. Clustering
d. Mirroring

Answer 10

b. Link aggregation

Question 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?
a. SMTP
b. CARP
c. DHCP
d. NTP

Answer 11

b. CARP

Question 12

Which of the following can be considered an advantage of clustering servers over
mirroring servers?
a. Clustering does not affect network performance.
b. Clustering keeps a more complete copy of a disk’s data.
c. Clustering failover takes place more rapidly.
d. Clustering has no geographical distance limitations.

Answer 12

c. Clustering failover takes place more rapidly.

Question 13

Which of the following offers the highest fault tolerance for shared data and programs?
a. RAID
b. Bonding
c. SANs (storage area networks)
d. NAS (network area storage) devices

Answer 13

c. SANs (storage area networks)

Question 14

Why do SANs save and retrieve files faster than NAS devices?
a. They use a proprietary network transmission method, rather than Ethernet.
b. They save files with similar characteristics in the same place on a drive.
c. They rely on customized Network and Transport layer protocols.
d. They save only the parts of files that were changed, rather than the file’s entire contents.

Answer 14

a. They use a proprietary network transmission method, rather than Ethernet.

Question 15

Suppose you are the network manager for an ISP whose network contains five file
servers that use software RAID, a NAS installation, and a SAN. You learn that the
company is taking on a huge Web hosting client and you need to add 10 TB of storage
space as soon as possible. To what part of the network should you add the storage
so that it causes the least disruption to the existing network?
a. To one of the server’s RAID arrays
b. To all of the servers’ RAID arrays
c. To the NAS
d. To the SAN

Answer 15

d. To the SAN

Question 16

Which factor must you consider when using cloud backups that you don’t typically
have to consider when backing up to an external storage device?
a. Number of clients attached to the network
b. Security
c. Future accessibility of data
d. Time to recover

Answer 16

b. Security

Question 17

In a Grandfather-Father-Son backup scheme, the October—week 1—Thursday backup
tape would contain what type of files?
a. Files changed since the previous Thursday
b. Files changed since a month ago Thursday
c. Files changed since Wednesday (a day before)
d. Files changed since the previous Wednesday

Answer 17

c. Files changed since Wednesday (a day before)

Question 18

In the Grandfather-Father-Son backup scheme, how frequently is a full backup
performed? (Choose all that apply.)
a. Daily
b. Twice a week
c. Weekly
d. Every other week
e. Monthly

Answer 18

c. Weekly
e. Monthly

Question 19

What is the difference between an incremental backup and a differential backup?
a. An incremental backup saves all the files on a disk, whereas a differential backup
saves only the files that have changed since the previous backup.

b. An incremental backup requires the network administrator to choose which files
should be backed up, whereas a differential backup automatically saves files that
have changed since the previous backup.

c. An incremental backup saves all files that haven’t been backed up since a defined
date, whereas a differential backup saves all files whose archive bit is set.

d. An incremental backup resets the archive bit after backing up files, whereas a differential backup does not.

Answer 19

d. An incremental backup resets the archive bit after backing up files, whereas a differential backup does not.

Question 20

You have been charged with creating a disaster recovery contingency plan for the
federal benefits agency where you work. Your supervisor has said that the network
must have the highest availability possible, no matter what the cost. Which type of
disaster recovery site do you recommend?
a. Cold site
b. Cool site
c. Warm site
d. Hot site

Answer 20

d. Hot site