Shaye Trenda


Chapter 9 Exercises

1.      Assume that your organization is planning to have an automated server room that functions without human assistance. Such a room is often called a lights-out server room. Describe the fire control system(s) you would install in that room.

a.     The fire control system for a lights-out server room should consist of:

i.              A thermal detection system: it consists of a sophisticated heat sensor that detects any rise in temperature above the optional one. Dry chemical or Halone is sprinkled in that room to control the ignition taken place inside the room.

ii.            Smoke detection system: it consists of air-aspirating detectors. They are very sophisticated systems and are used in very high-sensitive areas. They work by taking in air, filtering it and moving through a chamber containing a laser beam. If the laser beam is diverted or refracted by the smoke particles, the system is activated.

iii.           Flame detection system: it detects the infrared or ultraviolet light produced by an open flame.

2.     Assume you have converted an area of general office space into a server room. Describe the factors you would consider for each of the following components:

a.      Walls and doors: due to the construction of the walls and doors, the security of information assets can sometimes be compromised. In high security areas the firewalls and doors with either mechanical or electrochemical locks should be used.

b.     Access control: for physical security, a secure facility is an ideal location that has been engineered with a number of controls designed to minimize the risk of attacks from physical threats. An organization should consider using as many security controls as possible to secure a server room. Some physical security controls include: walls, fencing, guards, dogs, ID cards, locks, keys, alarms, electronic monitoring, and doors.

c.      Fire detection: manual or automatic fire detection systems need to be installed. Manual fire systems include human responses (calling the fire department), as well as manually activated alarms (sprinklers). Automatic detection systems include thermal detections systems, smoke detection systems, and flame detectors.

d.     Fire suppression: there are a variety of fire suppression systems commonly used in many organizations including: portal, manual, and automatic apparatus. One or more fire suppression systems should be prepared in case of emergency.

e.      Heating, ventilating, and air conditioning: since the operation of heating, ventilation and air conditioning (HVAC) system can have dramatic impacts on information systems operations and protection, four areas (temperature, filtration, humidity, and static electricity) within HVAC system should be properly managed.

f.       Power quality and distribution: emergency lighting in server room, emergency power shut off switch by exit door, emergency replacement server, uninterruptible power supply for LAN servers.

3.     Assume you have been asked to review the power needs of a stand-alone computer system that processes important but noncritical data. Although the system does not have to be online at all times, it stores valuable data that could be corrupted if the power system were suddenly interrupted. Which UPS features are most important to such a system? Which type of UPS do you recommend for it?

a. The 4 basic configurations of UPS are: standby, standby ferroresonant, line-interactive, and true online. Important consideration for UPS systems include: swtich time, the amount of electricity the UPS supplies, and cost. Switch time refers to the amount of time it takes for the UPS to activate a transfer switch. The wattage needed to keep the equipment running for certain period of time should be calculated, which helps in the selection of a proper UPS that meets the organizationís power supply needs. Also, the more sophisticated the UPS becomes, the more costly it is. The best way to select a UPS is to identify the smallest one necessary to provide the needed support. In this scenario, a standby ferroresonant UPS would be the best selection.

†5.† Define the required wattage for a UPS to be used with the following systems:

(assuming that the systems are operating in the United States at a standard voltage of 120 volts at 60 Hz)

a. Monitor: 2 amps; CPU: 3 amps; printer: 3 amps

a. (2 * 120) + (3 * 120) + (3 * 120) = 960 watts

b. Monitor: 3 amps; CPU: 4 amps; printer: 3 amps

b. (3 * 120) + (4 * 120) + (3 * 120) = 1,200 watts

c. Monitor: 3 amps; CPU: 4 amps; printer: 4amps

c. (3 * 120) + (4 * 120) + (4 * 120) = 1,320 watts

6. ††Search the Web for a UPS that provides the wattage necessary to run the systems described in Exercise 5 for at least 15 minutes during a power outage.

There are a multiple of different UPS that provide the wattage necessary to run the systems described in Exercise 5 for at least 15 minutes during a power outage. After searching the Web, I found a unit rated at 200 VA hours will support 800 watts for 15 minutes; so from the Exercise above, we can conclude that:

a.     240 VA hours

b.    300 VA hours

c.     330 VA hours

(assuming that the systems are operating in the United States at a standard voltage of 120 volts at 60 Hz)