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NEW QUESTION: 1
Which of the following term related to network performance refers to the delay that packet may experience on their way to reach the destination from the source?
A. Throughput
B. Jitter
C. Bandwidth
D. Latency
Answer: D
Explanation:
Explanation/Reference:
Latency 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.
In a network, latency, a synonym for delay, is an expression of how much time it takes for a packet of data to get from one designated point to another. In some usages (for example, AT&T), latency is measured by sending a packet that is returned to the sender and the round-trip time is considered the latency.
The latency assumption seems to be that data should be transmitted instantly between one point and another (that is, with no delay at all). The contributors to network latency include:
Propagation: This is simply the time it takes for a packet to travel between one place and another at the speed of light.
Transmission: The medium itself (whether optical fiber, wireless, or some other) introduces some delay.
The size of the packet introduces delay in a round trip since a larger packet will take longer to receive and return than a short one.
Router and other processing: Each gateway node takes time to examine and possibly change the header in a packet (for example, changing the hop count in the time-to-live field).
Other computer and storage delays: Within networks at each end of the journey, a packet may be subject to storage and hard disk access delays at intermediate devices such as switches and bridges. (In backbone statistics, however, this kind of latency is probably not considered.) 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 sen
The following answers are incorrect:
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 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
NEW QUESTION: 2
Which of the following reflect the SAP Fiori design? (3)
A. Visual design
B. Information architecture
C. Design thinking methodology
D. Interaction patterns
E. Unified user interface design
Answer: A,B,D
NEW QUESTION: 3
A security administrator wants to implement two-factor authentication for network switches androuters. The solution should integrate with the company's RADIUS server, which is used for authentication to the network infrastructure devices. The security administrator implements the following:
* An HOTP service is installed on the RADIUS server.
* The RADIUS server is configured to require the HOTP service for authentication.
The configuration is successfully tested using a software supplicant and enforced across all network devices.
Network administrators report they are unable to log onto the networkdevices because they are not being prompted for the second factor.
Which of the following should be implemented to BEST resolve the issue?
A. Replace the password requirement with the second factor. Network administrators will enter their username and then enter the token in place of their password in the password field.
B. Reconfigure network devices to prompt for username, password, and a token. Network administrators will enter their username and password, and then they will enter the token.
C. Configure the RADIUS server to accept the second factor appended to the password. Network administrators will enter a password followed by their token in the password field.
D. Install a TOTP service on the RADIUS server in addition to the HOTP service. Use the HOTP on older devices that do not support two-factor authentication. Network administrators will use a web portal to log onto these devices.
Answer: C
NEW QUESTION: 4
製品実装プロジェクトには、3つの内部リソースを使用して30日以内に完了する必要があることを示すベースラインスケジュールがあります。完成に近づくと、プロジェクトマネージャーは1つのリソースがプロジェクトチームに伝えていることを知りました。スポンサーは、追加費用で外部リソースを確保することを承認します。
予備費が必要になることを決定するために、プロジェクトマネージャーは何を計算する必要がありますか？
A. Variance at completion (VAC)
B. Cost variance (CV)
C. Estimate at completion (EAC)
D. Budget at completion (BAC)
Answer: A
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