CDCP 2nd

What is the primary reason to install a monitoring system in the data center?

• To notice abnormalities early so that actions can be taken to avoid disasters

• To create a proper asset database

• To implement automated change management

• To be able to collect data for capacity planning

What are the advantages/disadvantages of structured cabling?

• Structures cabling reduces the risk of downtime but complicates fault finding

• Structured cabling allows for easier re-patching, but it requires onsite crimping (connecting) of the connector to the cabling

• Structured cabling allows for longer cable length inside the computer room

• Structured cabling will reduce the risk of downtime and allow for easier (re-)patching

What is a requirement for both CCTV cameras and recording equipment?

• They must be of the same brand

• Both must be placed inside the computer room

• .Both must be connected to a UPS

• CCTV cameras can only be used to cover the outside of the building, where as the recording equipment needs to be located in a secure area

What is the main risk for a data center when the water supply fails?

• Failure to the water supply could result in IT failure and/or denial of access to operate

• Failure to the water supply could result in IT failure and/or denial of access to operate

• Failure to the water supply could cause issues for the cooling back-up generators

• Failure to the water supply could result in sudden changes of the relative humidity in the Computer room

What is the minimum clearance space required below water sprinkler heads and nozzles of gas-based fire suppression systems?

• 46 cm / 18 inches

• 64 cm / 25 inches

• 60 cm / 24 inches

• 120 cm / 47 inches

What causes most fires in data centers?

• a.Equipment overheating, loose connections, dead shorts

• a.Air conditioner temperature settings, fuels spills, packing material

• a.Lightning strikes, harmonic distortion, air conditioner temperature settings

• a.Low relative humidity, lightning strikes, air conditioner temperature settings

Which design consideration should be implemented with an Inergen-based fire suppression system?

• a.Install protective covers around the nozzles to avoid accidental gas dumps

• a.Install the gass containers (tanks) close to the data center

• a.To use Inergen only for fires which are not related to electrical power.

• a.Pressure relief valves/dampers are required in the room that needs protection

What should be considered when implementing hot- or cold-aisle containment in an existing computer room?

• a.Equipment will get too hot at the rear (back) of the rack potentially resulting in more ICT hardware failures

• a.The delta-T of the equipment will increase too much causing reliability issues

• a.It creates potential issues with the existing fire suppression system(s)

• a.It will be more difficult to install power and network cabling in the contained area

Which of the statement below is true?

• a.Single-mode cabling can use both LED and laser as a light source

• a.Single-mode cabling is more expensive than multi-mode cabling

• a.Multi-mode cabling can cross longer distances

• a.Multi-mode cabling is more expensive than single-mode cabling

Does shielded twisted pair network cabling provide protection against EMF from power cables?

• a.Yes, but only if the power cable is placed in a tre-foil cable arrangement

• a.Yes, as the shielding for twisted pair network cabling is specifically designed for low-frequency EMF protection

• a.No, the shielding is designed for alien cross-talk between network cables, it provides no or little protection against low-frequency EMF

• a.it provides no or little protection against low-frequency EMF

  b.No, the shielding for twisted pair network cabling is for physical protection against vandalism and accidental cutting the cable