Chapter 18 Data Centers - Terms

Question 1

AVAILABILITY

Answer 1

1. A measure of a network’s operation (up
   time) or absence of operating failure
   (downtime) during a given period of time.
2. The probability that a system or component
   is operating at a specified time.
3. The ratio of the total time a system or
   component is functional divided by the
   length of the time interval for which
   availability is being determined.
   TDMM: Page G-12

Question 2

DATA CNETER

Answer 2

A data center is an area of a
building, including support rooms,
that houses ICT infrastructure that
is used for the creation and
manipulation of data, voice,
video, and similar signals along
with all directly associated
peripheral support equipment,
storage, and activities.
TDMM: Page 18-1

Question 3

HDA

Answer 3

Horizontal Distribution Area
A space in a computer room w ere
a horizontal cross-connect HC is
located and may include A
switches, storaae area network
(SAN) and
keyboard/video/mouse (KVM)
switches for the end equipment
located in the equipment
distribution areas.
TDMM: Page GÆ3

Question 4

INFORMATION SECURITY

Answer 4

The practice of protecting the
confidentiality, integrity, and
availability of data
and resources.
TDMM: Page 18-25

Question 5

MDA

Answer 5

Main Distribution Area
The space in an equipment
room where the main cross-
connect is located.
TDMM: Page G-76

Question 6

“N”

Answer 6

Need
Symbol used to represent “the
need” for redundancy in a
particular system.
TDMM: Page 18-7

Question 7

RELIABILITY

Answer 7

The probability that a given
system will operate properly
without failure for a
given period of time.
TDMM: Page 78-29

Question 8

REDUNDANCY

Answer 8

Providing secondary
components that either become
instantly operational or are
continuously operational so that
the failure of a primary
component will not result in
mission failure.
TDMM: Page G-106