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NEW QUESTION: 1
Which of the following INCORRECTLY describes the layer function of the Application Layer within the TCP/IP model?
A. Provides user interface
B. Keeps separate the data of different applications
C. Perform data processing such as encryption, encoding, etc
D. Provides reliable delivery
Answer: D
Explanation:
Explanation/Reference:
The word INCORRECTLY keyword is used in the question.
You need to find out the service or functionality which is not performed by application layer of a TCP/IP model.
The reliable or unreliable delivery of a message is the functionality of transport layer of a TCP/IP model.
For your exam you should know below information about TCP/IP model:
Network Models

Layer 4. Application Layer
Application layer is the top most layer of four layer TCP/IP model. Application layer is present on the top of the Transport layer. Application layer defines TCP/IP application protocols and how host programs interface with Transport layer services to use the network.
Application layer includes all the higher-level protocols like DNS (Domain Naming System), HTTP (Hypertext Transfer Protocol), Telnet, SSH, FTP (File Transfer Protocol), TFTP (Trivial File Transfer Protocol), SNMP (Simple Network Management Protocol), SMTP (Simple Mail Transfer Protocol) , DHCP (Dynamic Host Configuration Protocol), X Windows, RDP (Remote Desktop Protocol) etc.
Layer 3. Transport Layer
Transport Layer is the third layer of the four layer TCP/IP model. The position of the Transport layer is between Application layer and Internet layer. The purpose of Transport layer is to permit devices on the source and destination hosts to carry on a conversation. Transport layer defines the level of service and status of the connection used when transporting data.
The main protocols included at Transport layer are TCP (Transmission Control Protocol) and UDP (User Datagram Protocol).
Layer 2. Internet Layer
Internet Layer is the second layer of the four layer TCP/IP model. The position of Internet layer is between Network Access Layer and Transport layer. Internet layer pack data into data packets known as IP datagram's, which contain source and destination address (logical address or IP address) information that is used to forward the datagram's between hosts and across networks. The Internet layer is also responsible for routing of IP datagram's.
Packet switching network depends upon a connectionless internetwork layer. This layer is known as Internet layer. Its job is to allow hosts to insert packets into any network and have them to deliver independently to the destination. At the destination side data packets may appear in a different order than they were sent. It is the job of the higher layers to rearrange them in order to deliver them to proper network applications operating at the Application layer.
The main protocols included at Internet layer are IP (Internet Protocol), ICMP (Internet Control Message Protocol), ARP (Address Resolution Protocol), RARP (Reverse Address Resolution Protocol) and IGMP (Internet Group Management Protocol).
Layer 1. Network Access Layer
Network Access Layer is the first layer of the four layer TCP/IP model. Network Access Layer defines details of how data is physically sent through the network, including how bits are electrically or optically signaled by hardware devices that interface directly with a network medium, such as coaxial cable, optical fiber, or twisted pair copper wire.
The protocols included in Network Access Layer are Ethernet, Token Ring, FDDI, X.25, Frame Relay etc.
The most popular LAN architecture among those listed above is Ethernet. Ethernet uses an Access Method called CSMA/CD (Carrier Sense Multiple Access/Collision Detection) to access the media, when Ethernet operates in a shared media. An Access Method determines how a host will place data on the medium.
IN CSMA/CD Access Method, every host has equal access to the medium and can place data on the wire when the wire is free from network traffic. When a host wants to place data on the wire, it will check the wire to find whether another host is already using the medium. If there is traffic already in the medium, the host will wait and if there is no traffic, it will place the data in the medium. But, if two systems place data on the medium at the same instance, they will collide with each other, destroying the data. If the data is destroyed during transmission, the data will need to be retransmitted. After collision, each host will wait for a small interval of time and again the data will be retransmitted.
Protocol Data Unit (PDU) :
Protocol Data Unit - PDU

The following answers are incorrect:
The other options correctly describe functionalities of application layer in TCP/IP model.
The following reference(s) were/was used to create this question:
CISA review manual 2014 page number 272

NEW QUESTION: 2

Select and Place:

Answer:
Explanation:

Explanation/Reference:
a. MIB (Management Information Base)
A MIB is nothing more than a database of objects. The MIB has a tree- like structure, similar to a file system. Each leaf object represents a parameter on the managed device. A common understanding of the MIB between NMSand agent is what allows SNMP communications to work.
b. SNMP ( Simple Network Management Protocol)
Simple Network Management Protocol (SNMP) is the de facto standard network management protocol for the IP protocol suite. Developed in the late 1980s by the IETF (Internet Engineering Task Force), SNMP provides a simple means for vendors to provide management capabilities to their networking devices SNMP defines a manager/agent relationship for network management. A manager device essentially has two functions: monitor and control. It monitors network devices (agents) by sending queries for performance, configuration, and status information. It controls agents by sending directives to change configuration parameters. An example of an SNMP manager is an NMS (network management station) running CiscoWorks2000, while an agent might be a Cisco 7500 router. The NMS, acting as manager, communicates with the 7500, acting as agent, for information about its performance. SNMP is the protocol they use to communicate. An NMS can manage systems that include hosts, servers, routers, switches, hubs, UPSs, or most any network-attached device. The NMS runs the network management applications, such as CiscoWorks2000, that present management information to network managers and other users.
The processing of SNMP is mostly performed by the NMS.

NEW QUESTION: 3
注：この質問は、同じシナリオを提示する一連の質問の一部です。シリーズの各質問には、述べられた目標を達成する可能性のある独自の解決策が含まれています。一部の質問セットには複数の正しい解決策がある場合がありますが、他の質問セットには正しい解決策がない場合があります。
このセクションの質問に回答した後は、その質問に戻ることはできません。その結果、これらの質問はレビュー画面に表示されません。
Azure Machine Learningを使用して、分類モデルをトレーニングする実験を実行しています。
Hyperdriveを使用して、モデルのAUCメトリックを最適化するパラメーターを見つけたいと考えています。次のコードを実行して、実験用にHyperDriveConfigを構成します。

この構成を使用して、ランダムフォレストモデルをトレーニングし、検証データでテストするスクリプトを実行することを計画しています。検証データのラベル値はy_test変数という名前の変数に格納され、モデルから予測された確率はy_predictedという名前の変数に格納されます。
HyperdriveがAUCメトリックのハイパーパラメータを最適化できるようにするには、スクリプトにログを追加する必要があります。
解決策：次のコードを実行します。

ソリューションは目標を達成していますか？
A. いいえ
B. はい
Answer: A
Explanation:
Explanation
Use a solution with logging.info(message) instead.
Note: Python printing/logging example:
logging.info(message)
Destination: Driver logs, Azure Machine Learning designer
Reference:
https://docs.microsoft.com/en-us/azure/machine-learning/how-to-debug-pipelines

NEW QUESTION: 4
The simplest form of quantitative risk analysis and modeling techniques is______________
A. Utility theory
B. Delphi technique
C. Sensitivity analysis
D. Probability analysis
Answer: C
Explanation:
Explanation/Reference:
Explanation:
Sensitivity analysis, as a quantitative risk analysis and modeling technique, helps to determine the risks that have the most potential impact on the project. It examines the extent to which the uncertainty of each project element affects the objective being examined when all other uncertain elements are held at their baseline values.