Explanation/Reference:
Explanation:
Performance of a biometric measure is usually referred to in terms of the false accept rate (FAR), the false non match or reject rate (FRR), and the failure to enroll rate (FTE or FER). The FAR measures the percent of invalid users who are incorrectly accepted in, while the FRR measures the percent of valid users who are wrongly rejected.

Explanation/Reference:
Explanation:
Mandatory access controls are prohibitive; anything that is not expressly permitted is forbidden. Only within this context do discretionary controls operate, prohibiting still more access with the same exclusionary principle. When systems enforce mandatory access control policies, they must distinguish between these and the mandatory access policies that offer more flexibility.
Discretionary controls do not override access controls and they do not have to be permitted in the security policy to be effective.

Explanation/Reference:
Explanation:
A business case can and should be used throughout the life cycle of the product. It serves as an anchor for new (management) personnel, helps to maintain focus and provides valuable information on estimates vs.
actuals. Questions like, 'why do we do that,"what was the original intent' and 'how did we perform against the plan' can be answered, and lessons for developing future business cases can be learned. During the development phase of a project one should always validate the business case, as it is a good management instrument. After finishing a project and entering production, the business case and all the completed research are valuable sources of information that should be kept for further reference

Section: Information System Operations, Maintenance and Support
Explanation/Reference:
In computer networks, bandwidth is often used as a synonym for data transfer rate - it is the amount of data
that can be carried from one point to another in a given time period (usually a second).
This kind of bandwidth is usually expressed in bits (of data) per second (bps). Occasionally, it's expressed
as bytes per second (Bps). A modem that works at 57,600 bps has twice the bandwidth of a modem that
works at 28,800 bps. In general, a link with a high bandwidth is one that may be able to carry enough
information to sustain the succession of images in a video presentation.
It should be remembered that a real communications path usually consists of a succession of links, each
with its own bandwidth. If one of these is much slower than the rest, it is said to be a bandwidth bottleneck.
For your exam you should know below information about Network performance:
Network performance refers to measurement of service quality of a telecommunications product as seen
by the customer.
The following list gives examples of network performance measures for a circuit-switched network and one
type of packet-switched network (ATM):
Circuit-switched networks: In circuit switched networks, network performance is synonymous with the grade
of service. The number of rejected calls is a measure of how well the network is performing under heavy
traffic loads. Other types of performance measures can include noise, echo and so on.
ATM: In an Asynchronous Transfer Mode (ATM) network, performance can be measured by line rate,
quality of service (QoS), data throughput, connect time, stability, technology, modulation technique and
modem enhancements.
There are many different ways to measure the performance of a network, as each network is different in
nature and design. Performance can also be modeled instead of measured; one example of this is using
state transition diagrams to model queuing performance in a circuit-switched network. These diagrams
allow the network planner to analyze how the network will perform in each state, ensuring that the network
will be optimally designed.
The following measures are often considered important:
Bandwidth - Bandwidth is commonly measured in bits/second is the maximum rate that information can be
transferred
Throughput - Throughput is the actual rate that information is transferred
Latency - Latency is the delay between the sender and the receiver decoding it, this is mainly a function of
the signals travel time, and processing time at any nodes the information traverses
Jitter - Jitter is the variation in the time of arrival at the receiver of the information
Error Rate - Error rate is the number of corrupted bits expressed as a percentage or fraction of the total
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The following answers are incorrect:
Throughput - Throughput is the actual rate that information is transferred
Latency - Latency is the delay between the sender and the receiver decoding it, this is mainly a function of
the signals travel time, and processing time at any nodes the information traverses
Jitter - Jitter is the variation in the time of arrival at the receiver of the information
The following reference(s) were/was used to create this question:
CISA review manual 2014 page number 275