Question 1

Within a data center, how many concentric layers are considered necessary to provide effective security?

Accepted Answer

Data centers typically employ four concentric layers of security: perimeter security, facility controls, computer room controls, and cabinet controls, to ensure comprehensive protection.

Question 2

What is the MAXIMUM horizontal cable length permitted for centralized optical fiber cabling from the MDA within a data center?

Accepted Answer

The maximum horizontal cable length permitted for centralized optical fiber cabling from the MDA within a data center is 300 m (984 ft). This is specified in the TIA-942-B standard for data center cabling.

Question 3

If you have a data center where the entire infrastructure must be completely shutdown on an annual basis to perform preventative maintenance and repair work, what tier level would this represent?

Accepted Answer

Tier I data centers only require a single, non-redundant distribution path and typically do not have any redundant components or backup systems. Shutting down the entire infrastructure for maintenance would not affect the data center's availability. Tier II, Tier III, and Tier IV data centers have higher availability requirements and would not require a complete shutdown for maintenance.

Question 4

What is the MINIMUM vertical separation between the top rail of a railroad track and telecommunications facilities placed beneath the track?

Accepted Answer

The answer of What is the MINIMUM vertical separation between...

Question 5

You have determined that your underground cable design requires three maintenance holes (MHs). One is 4.3 m (14 ft), one is 6 m (20 ft), and one is 6.7 m (22 ft) in length. How many MH covers are required to serve these MHs?

Accepted Answer

The answer of You have determined that your underground cable...

Question 6

Within a data center, if you have a system which includes one extra unit, in addition to the minimum required to satisfy the base need, and where the failure of this unit will NOT disrupt operations, what level of redundancy would this represent?

Accepted Answer

Redundancy is a measure of how many backup systems are in place to ensure continuity of operations in the event of a failure. N+1 redundancy means that there is one additional unit available beyond the minimum required to ensure that operations can continue even if one unit fails. In this case, the failure of the extra unit will not disrupt operations, so it can be considered a backup system rather than a primary one. Therefore, the best choice is B.

Question 7

What warning tape color has the Common Ground Alliance (CGA) adopted for telecommunications and CATV cables?

Accepted Answer

The CGA has adopted orange as the warning tape color for telecommunications and CATV cables.

Question 8

An outside plant (OSP) cable must be placed under a pipeline with two side by side pipe runs. The distance between the outside pipes is 6 m (20 ft). What is the length of the conduit required to facilitate the pipeline crossing?

Accepted Answer

The answer of An outside plant (OSP) cable must be...

Question 9

Within a data center, if you have dual path connectivity between the primary entrance room and secondary entrance room, in addition to dual connectivity between these two rooms and the main distribution and secondary distribution areas, what tier level would this infrastructure design represent?

Accepted Answer

The answer of Within a data center, if you have...

Question 10

You are designing an interactive patient television system (IPTS) that will provide internet, nurse call and LCD television services. From the following, which medium will NOT support these services in a backbone cabling system?

Accepted Answer

Balanced twisted pair is not suitable for backbone cabling because it is not capable of supporting the high bandwidth and distance requirements of these services.

Question 11

What does ANSI/TIA 942 recommend as the MINIMUM height for overhead cable tray above finished floor within a data center?

Accepted Answer

The answer of What does ANSI/TIA 942 recommend as the...

Question 12

What type of redundancy provides two complete units, modules, paths or systems for every one required for a base system.

Accepted Answer

2N provides two complete units for every one required for the base system, making it a 2:1 redundancy ratio.

Question 13

You have been asked to spec the physical security requirements related to the protection of assets for a new data center. The most common potential for damage categories you have considered include temperature, gases, organisms and projectiles. The one category that you have missed is:

Accepted Answer

Liquids are a common potential for damage in data centers due to risks like flooding or leaks, which can cause significant harm to electronic equipment.

Question 14

It is important to keep all underfloor cabling systems very neat and orderly. Cabling systems must be managed to ensure that air flow is not impeded by the height or volume of underfloor cabling. Keeping copper communications cabling properly separated from is one design approach. To resolve this:

Accepted Answer

It is recommended to route copper cables in the hot aisle and power cabling in the cold aisle to keep them separated and maintain proper airflow. This helps to prevent cabling from impeding air circulation and affecting data center cooling. Routing power cabling in the overhead space can also be an option, but it requires additional design considerations and may not be feasible in all situations.

Question 15

Vertical conduit masts (with approved service heads) are limited to drop-wire attachments of up to ________ lines.

Accepted Answer

According to industry standards and regulations, vertical conduit masts can only support a maximum of 4 drop wires.

Question 16

What type of redundancy provides two additional units, modules, paths, or systems in addition to the MINIMUM required to satisfy the base requirement.

Accepted Answer

N+2 redundancy means having two additional units or systems beyond the minimum required (N) to ensure reliability and fault tolerance.

Question 17

The information technology system (ITS) designer should design conduits entering a building from below grade point to extend ________ above finished floor (AFF).

Accepted Answer

The answer of The information technology system (ITS) designer should...

Question 18

You are designing a cabling containment system installed overhead in a new data center. The main or prime purpose of the system will be to manage fiber optic cabling between cabinets. You have a choice of designs of the containment system. In view of the prime purpose of containment system, your first choice of design will be one that:

Accepted Answer

The answer of You are designing a cabling containment system...

Question 19

If you have a 30 cm (12 in) wide data tray, what does ANSI/TIA 569-B recommend be the maximum pathway fill cross sectional area assuming a MAXIMUM pathway depth of 15 cm (6 in)?

Accepted Answer

According to ANSI/TIA 569-B, the maximum pathway fill ratio should not exceed 40% for pathways more than 2 inches wide. Therefore, in this case, the maximum pathway fill cross-sectional area would be 40% of the tray area, which is (30 cm x 15 cm) x 0.40 = 180 sq cm. However, it is recommended to leave at least a 2cm (0.75 in) clearance around cables in order to maintain proper airflow and avoid overheating. Therefore, the maximum recommended pathway fill cross-sectional area would be 150 sq cm (24 sq in).

Question 20

The ________ system is an application used for storing and viewing captured digital radiology image files.

Accepted Answer

PACS (Picture Archiving and Communication System) is the application used for storing and viewing digital radiology image files, while CCU (Cardiac Care Unit) and ICU (Intensive Care Unit) are medical units and DICOM (Digital Imaging and Communications in Medicine) is a standard used for communication and management of medical imaging information.

Exam 1: BICSI Registered Communications Distribution Designer - RCDD