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QUESTION NO: 51

A network administrator configures OSPF in a network with ArubaOS switches. The administrator is concerned that a rogue device might connect to an access layer switch and introduce OSPF routes to the company’s routing topology. The access VLANs do not contain additional routers.

What should the administrator do so switches do not form an adjacency with rogue devices on the access VLANs?

A. Implement BPDU filtering on interfaces assigned to these VLANs.

B. Configure the VLANs as passive OSPF interfaces.

C. Configure the interfaces with the highest OSPF DR priority.

D. Apply outbound routing policies to filter routes on the VLANs.

Answer: B

QUESTION NO: 52

A network administrator has copied new software to an ArubaOS switch and placed this software in the secondary flash location. The switch is currently booting from the primary location. The administrator wants the switch to start using the new software.

What should the administrator do to accomplish this?

A. Reboot the switch, which automatically causes the switch to use the newer software.

B. Execute the command to boot the system from the secondary flash.

C. Rename the secondary software as the primary software.

D. Copy the secondary software to the primary software slot.

Answer: B

QUESTION NO: 53

Which security benefit does SNMPv3 offer that SNMPv2 does not offer?

A. SSL encryption

B. Scopes

C. Data integrity

D. RADIUS groups

Answer: A

QUESTION NO: 54

The network administrator wants to know which device, type, and manufacturer is connected to port 10 on an Aruba 3810 switch.

Which command could provide this information?

A. show interface 10

B. show mac-address 10

C. show lacp peer 10

D. show lldp remote-device 10

Answer: D

References:

QUESTION NO: 55

Which benefit does Aruba Clarity in Aruba AirWave provide?

A. It provides an easily searchable network topology that includes physical wired, physical wireless, and virtual network infrastructure devices.

B. It helps managers use the AirWave Management Platform (AMP) with its context-specific help and links to additional resources.

C. It enables managers to view all configuration templates for APs, and switches from a single dashboard.

D. It provides at-a-glance views of issues such as DHCP request and 802.1X authentication failures to aid in troubleshooting.

Answer: A

QUESTION NO: 56

A Virtual Switching Framework (VSF) fabric currently has two members and two physical 10GbE links in its VSF link.

Which administrative task can a network administrator perform on this VSF fabric when both members are online?

A. Remove a VSF member.

B. Add a new 40GbE link to the VSF link.

C. Remove one of the physical links in the VSF link.

D. Change the VSF link to use 40GbE links instead of 10GbE links.

Answer: A

QUESTION NO: 57

Refer to the exhibit.

Based on the topology shown in the exhibit, which symptom does a network administrator see if the ArubaOS switches are in their factory default states?

A. Ports places in a blocking state

B. Mislearned MAC addresses

C. TTL expired in transit

D. Layer 3 loop

Answer: D

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QUESTION NO: 43

For which of the following scenarios can you delete an entity?

A. The entity is part of a managed solution and no other items are
B.  The entity is system-defined and no other items are dependent
C. The entity is part of an unmanaged solution and another unmanaged
D. The entity is custom and uses a system-defined global option set.

Answer: A     

QUESTION NO: 44

You plan to delete a custom entity from an unmanaged solution. Which of the following statements is true?

A. You must delete the solution that contains the entity.
B. You can only delete the entity from managed solutions.
C. You must delete all records related to the entity from the database.
D. You must remove any dependencies with other objects.

Answer:   D  

QUESTION NO: 45

You plan to entity mapping to replicate data from a text field between two related entities.
For which scenario can you replicate data?

A. The target field is already mapped to a different source field.
B. The length of the source field is smaller than the destination field
C. The two entities are in a N:N relationship.
D. The new record is created and then related to the parent record

Answer:  B   

QUESTION NO: 46

Your company rents tools and machines to customers. You create a custom entity named Equipment to track the tools and machines.
You need to show the hierarchical relationships between various pieces of equipment. How should you configure the relationship?

A. Ensure that you enable Connections for the entity.
B. Set up a parental 1:N relationship between Accounts and Equipment.
C. Create a self-referential relationship and configure hierarchy settings.
D. Set up a N:N relationship between Accounts and Equipment.

Answer:   C  

QUESTION NO: 47

You need to create a hyperlink field to capture the URL for a contact's Linkedln profile.
Which data type should you use for the field?

A. single line of text
B. web
C. URL
D. text area

Answer:  A   

QUESTION NO: 48

A group of users must be able to associate a time zone with a record.
You need to implement the required functionality by using native Microsoft Dynamics 365 features.
Which field type should you use?

A. option set
B. multiple lines of text
C. whole number
D. lookup

Answer: C 

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QUESTION NO: 135

Which type of information should you be looking for when asking customers about their business strategies?

A. metrics they have used to measure the ROl of previous initiatives
B. measurements that help improve business processes
C. policies and plans they have made to meet their financial goals
D. actions they have taken to increase their market share

Answer: B

QUESTION NO: 136

How does artificial intelligence help businesses get the most out of their loT implementations?

A. It enables them to archive the vast amounts of data collected by the loT devices.
B. It enables them to enhance the security for data collected by the devices.
C. It provides a mechanism to change their business priorities on the fly.
D. It gives them real-time insights into loT data to improve their business outcomes.

Answer: D

QUESTION NO: 137

What is one of the most effective ways to start a discovery conversation with a customer?

A. Discuss the HPE solutions that you think are best suited for this type of customer.
B. Ask about the company's priorities and strategies and listen to determine issues and obstacles.
C. Establish trust by describing the distinguished history of innovation at HPE.
D. Tell them about one of your recent sales wins to demonstrate your ability to handle this deal.

Answer: B

QUESTION NO: 138

Which words can you use to help customers see the benefits of hybrid IT?

A. elastic and agile
B. Manual and customized
C. one-size-fits-all
D. deliberate and intricate

Answer: A

QUESTION NO: 139
Which acquisition adds advanced data management capabilities for hyperconverged data centers?

A. Aruba
B. Niara
C. SimpliVity
D. Cloud Cruiser

Answer: C
https://www.hpe.com/emea_europe/en/integrated-systems/simplivity.html

QUESTION NO: 140

What is one trend that drives the need for HPE Intelligent Edge solutions?

A. a more cautious approach to as-a-service solutions
B. the need to shift from a CAPEX to an OPEX funding model.
C. demands for more rapid provisioning of applications.
D. a workforce that is much more mobile and collaborative.

Answer: D

QUESTION NO: 141

Which question can you ask to identify an opportunity for selling an HPE intelligent Workspace solution?

A. Can you tell me your plan for implementation IoT?
B. Have you considered using context and location-based services to track your customer?
C. Do you have concerns about employee productivity and collaboration?
D. What steps are you taking to keep your network secure?

Answer: C

QUESTION NO: 142

A customer wants to keep workloads on-premises but also likes the public cloud model of paying for just the IT resources they consume, What customer needs?

A. HPE Flexible Capacity
B. HPE hyperconverged infrastructure
C. HPE Synergy
D. HPE Machine

Answer: A


QUESTION NO: 143

What is one way that HPE is preparing to help customers for a data-driven future?

A. creating the industry's most comprehensive network of cloud storage providers
B. moving all analytics from the edge to the core where decisions can be made more quickly
C. developing in-memory computing that can analyze data at much greater speeds
D. focusing research efforts on faster processors to meet the needs of future apps

Answer: C


QUESTION NO: 144

What is one distinguishing feature of Aruba solutions for retail customers?

A. Aruba ClearPass simplifies the deployment of access points (APs) at small branch sites such as retail
outlets.
B. Aruba unified communications (UC) solutions provide a cost-effective, but feature-rich alternative to
Microsoft Skype for Business.
C. Aruba high performance computing (HPC) solutions are cost-effective enough for retailers to use at the
network edge.
D. Aruba Location Services help retailers engage with their customers with wayfinding tools and contextbased noti-fications.

Answer: D

Reference: https://unacast.s3.amazonaws.com/c0290a0618cd4c939292ef7a745c2654.pdf


QUESTION NO: 145
What is one unique benefit of an HPE hosted solution?

A. The HPE solution uses a hypervisor to host several virtual machines on the same hardware.
B. HPE optimizes for price over performance because that is what customers need today.
C. The HPE solution is powered by industry-leading high performance computing (HPC) at the core.
D. HPE can provide a tested, converged solution from the data center to the edge.

Answer: D

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QUESTION NO: 105

Which command displays the egress interfaces selected on the PFE for destination prefixes?

A. show route forwarding-table

B. show route table

C. show route table extensive

D. show pfefwdd

Answer: A

QUESTION NO: 106

Which route filter match type only matches prefixes greater than the defined prefix?

A. exact

B. upto

C. longer

D. orlonger

Answer: C

QUESTION NO: 107

In which hierarchy are routing policies defined?

A. [edit policy-options]

B. [edit routing-options]

C. [edit forwarding-options]

D. [edit protocols]

Answer: A

QUESTION NO: 108

What are two default routing policies on Junos devices? (Choose two.)

A. The BGP import policy accepts all BGP routes.

B. The BGP export policy rejects all active BGP routes.

C. The OSPF import policy accepts all OSPF routes.

D. The OSPF export policy accepts all active OSPF routes.

Answer: A,C

QUESTION NO: 109

Which statement is correct about policies in the Junos OS?

A. Import policies are used to filter routes from the routing table to the forwarding table.

B. Import policies are used to filter routes destined for the routing table.

C. Import policies are used to filter routes being sent to neighboring devices.

D. Import policies are used to filter traffic entering the device.

Answer: B

QUESTION NO: 110

Which statement is correct about policies in the Junos OS?

A. Export policies are used to filter routes from the RE forwarding table to the PFE forwarding table.

B. Export policies are used to filter routes destined for the routing table.

C. Export policies are used to filter routes being sent to neighboring devices.

D. Export policies are used to filter traffic leaving the device.

Answer: C

QUESTION NO: 111

What is the default action for firewall filters?

A. accept

B. reject

C. discard

D. log

Answer: C

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QUESTION NO: 62

You are working for a client who has a cloud-hosted production system on Microsoft Dynamics 365 for

Finance and Operations.

The client requests for you to apply to a package to the Production environment.

What should you do?

A. Log onto each Production AOS cloud-hosted server, and use ModelUtil.exe to import the package into the Pro-duction model store.

B. Generate a runbook for the package by using AXUpdateInstaller.exe, and execute the runbook on each Produc-tion AOS cloud-hosted server.

C. Log into Lifecycle Services (LCS) for the client’s project, view the details for the Production environment, click on Maintain, and then Apply updates.

D. Log into Lifecycle Services (LCS) for the client’s project, click on Service requests, and, then create a service request to apply the package.

Answer: C

References:

https://docs.microsoft.com/en-us/dynamics365/unified-operations/dev-itpro/deployment/apply-deployablepackage-system

QUESTION NO: 63

You are using the Retail Software Development Kit (SDK) to deploy packages.

Which best practice should you follow?

A. Host the SDK in Lifecycle Services (LCS).

B. Use hooks rather than override handlers.

C. Directly extend any projects involving Microsoft hotfixes or updates.

D. Use triggers to call to new logic within a project.

Answer: D

QUESTION NO: 64

You are working in a Microsoft Dynamics 365 for Retail environment and are troubleshooting a scanner that is not able to scan a bar code on an item.

You review the event logs on the Retail Server and find several recent events in which the AppSessionId is a non-empty GUID and the UserSessionId contains an empty GUID.

What is the main cause of the events in the event log?

A. The scanner does not have power.

B. The scanner is in offline mode.

C. The scanner has not been signed into by a user.

D. The scanner cannot make a call to the retail server.

Answer: C

References:

https://docs.microsoft.com/en-us/dynamics365/unified-operations/retail/dev-itpro/retail-component-eventsdiagnostics-troubleshooting

QUESTION NO: 65

In a product meeting with a new client, you are asked to describe the key components of the Commerce

Runtime (CRT) for retail development.

What are two of these key components? Each correct answer presents a complete solution.

A. Data Access

B. Retail Scheduler

C. Master Data

D. API

Answer: AD

References:

https://technet.microsoft.com/en-us/library/jj916620.aspx

QUESTION NO: 66

You are a system administrator for a company’s Microsoft Dynamics 365 for Finance and Operations – Retail live environment.

You are responsible for ensuring the environment runs smoothly.

In which scenario would you need to monitor diagnostic data in the hot path?

A. One of the servers in the environment crashed, and you need to troubleshoot the cause of the crash.

B. Telemetry data from other components in your hybrid cloud are not being replicated or backed up.

C. The environment is experiencing performance issues, and you suspect that it is due to hardware issues.

D. Errors exist in one of the Retail Server components, and you need to troubleshoot the root cause of the issues.

Answer: C

QUESTION NO: 67

You are in a product meeting with a new client.

The client asks about the key components for the commerce data exchange for retail development.

Which two features should you describe to the client? Each correct answer presents part of the solution.

A. Data Access

B. API

C. Retail Schedule

D. Master Data

Answer: CD

QUESTION NO: 68

You are a developer for an Independent Software Vendor (ISV).

You want to create packages for a Microsoft Dynamics 365 for Retail environment.

Which application tool serves as the storage and development area for packages?

A. Asset Library

B. Lifecycle Services (LCS)

C. Runbook

D. Visual Studio Team Services (VSTS)

Answer: B

QUESTION NO: 69

You are a developer for an Independent Software Vendor (ISV).

You need to create and modify enumerations within Microsoft Dynamics 365 for Finance and Operations.

Which two statements are true about using extensible enumerations? Each correct answer presents a complete solu-tion.

A. Integer values that belong to the baseline enum are deterministic.

B. The default base enum value can be changed.

C. The Label property on the extended base enum can be modified.

D. The Label property on any base enum value can be modified.

Answer: AC

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QUESTION NO: 182

Which of the following does not apply to system-generated passwords?

A. Passwords are harder to remember for users.

B. If the password-generating algorithm gets to be known, the entire system is in jeopardy.

C. Passwords are more vulnerable to brute force and dictionary attacks.

D. Passwords are harder to guess for attackers.

Answer: C

Users tend to choose easier to remember passwords. System-generated passwords can provide stronger, harder to guess passwords. Since they are based on rules provided by the administrator, they can include combinations of uppercase/lowercase letters, numbers and special characters, making them less vulnerable to brute force and dictionary attacks. One danger is that they are also harder to remember for users, who will tend to write them down, making them more vulnerable to anyone having access to the user's desk. Another danger with system-generated passwords is that if the password-generating algorithm gets to be known, the entire system is in jeopardy.

Source: RUSSEL, Deborah & GANGEMI, G.T. Sr., Computer Security Basics, O'Reilly, July 1992 (page 64).

QUESTION NO: 183

Which of the following is not a preventive login control?

A. Last login message

B. Password aging

C. Minimum password length

D. Account expiration

Answer: A

The last login message displays the last login date and time, allowing a user to discover if their account was used by someone else. Hence, this is rather a detective control.

Source: RUSSEL, Deborah & GANGEMI, G.T. Sr., Computer Security Basics, O'Reilly, July 1992 (page 63).

QUESTION NO: 184

What is the most critical characteristic of a biometric identifying system?

A. Perceived intrusiveness

B. Storage requirements

C. Accuracy

D. Scalability

Answer: C

Accuracy is the most critical characteristic of a biometric identifying verification system.

Accuracy is measured in terms of false rejection rate (FRR, or type I errors) and false acceptance rate (FAR or type II errors).

The Crossover Error Rate (CER) is the point at which the FRR equals the FAR and has become the most important measure of biometric system accuracy.

Source: TIPTON, Harold F. & KRAUSE, Micki, Information Security Management Handbook, 4th edition (volume 1), 2000, CRC Press, Chapter 1, Biometric Identification (page 9).

QUESTION NO: 185

What is considered the most important type of error to avoid for a biometric access control system?

A. Type I Error

B. Type II Error

C. Combined Error Rate

D. Crossover Error Rate

Answer: B

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QUESTION NO: 29
A customer needs to simplify their network by creating a single virtual networking device.
Which HPE solution satisfies the customer's needs?

A. FlexNetwork
B. Aruba Airwave
C. OpenFlow
D. Intelligent Resilient Framework

Answer: D


QUESTION NO: 30
You are troubleshooting HPE ProLiant servers for a customer. The customer has granted you read-only access to HPE OneView. You need to download the audit log from OneView.
Which permission level should the customer give you?

A. Server administrator
B. Network administrator
C. Backup administrator
D. Infrastructure administrator

Answer: A


QUESTION NO: 31 DRAG DROP
Match each workload profile description with the corresponding profile.

Answer: <map><m x1="6" x2="91" y1="18" y2="33" ss="0" a="0" /><m x1="9" x2="140" y1="36" y2="57" ss="0" a="0" /><m x1="9" x2="150" y1="58" y2="77" ss="0" a="0" /><m x1="236" x2="413" y1="20" y2="36" ss="1" a="0" /><m x1="234" x2="411" y1="40" y2="56" ss="1" a="0" /><m x1="236" x2="412" y1="59" y2="77" ss="1" a="0" /><c start="0" stop="1" /><c start="1" stop="2" /><c start="2" stop="0" /></map>

Missing Critical = Large number of database operations
Transactional Application Processing = Trades performance for reliability
General Peak Frequency Compute = Maximize processor speed

QUESTION NO: 32
A customer has implemented an HPE ProLiant server with internal storage and needs to monitor the array health status.
Which management application can the customer use to discover errors quickly and minimize the possible downtime?

A. Smart Storage Administrator
B. Insight Online
C. InfoSight
D. Intelligent Management Center

Answer: C


QUESTION NO: 34
You plan to perform maintenance on several systems in a rack. You need to ensure that the rack does not tip when you are working on the equipment.
What should you use?

A. stabilizer kit
B. adjustable depth frame
C. lockable casters
D. leveling feet

Answer: D


QUESTION NO: 35
You are creating an internal array on an HPE ProLiant server.
What can you do to maximize the storage space efficiency?

A. Populate drive bays with the largest-capacity drive first.
B. Install drives that have the same capacity.
C. Match the device numbers for the drives with their bay numbers.
D. Populate drive bays with the smallest-capacity drive first.

Answer: B


QUESTION NO: 36
A customer has an application that consumes 500 GB storage and requires an RTO and RPO of 15 minutes.
Which backup and recovery technology enables the customer to meet their requirements in the most cost effective manner?

A. remote storage replication
B. offsite tape backup
C. disk-to-disk appliance
D. log shipping
Answer: B

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QUESTION NO: 71

Problem Scenario 71 :

Write down a Spark script using Python,

In which it read a file "Content.txt" (On hdfs) with following content.

After that split each row as (key, value), where key is first word in line and entire line as value.

Filter out the empty lines.

And save this key value in "problem86" as Sequence file(On hdfs)

Part 2 : Save as sequence file , where key as null and entire line as value. Read back the stored sequence files.

Content.txt

Hello this is ABCTECH.com

This is XYZTECH.com

Apache Spark Training

This is Spark Learning Session

Spark is faster than MapReduce

Answer: See the explanation for Step by Step Solution and configuration.

Explanation:

Solution :

Step 1 :

# Import SparkContext and SparkConf

from pyspark import SparkContext, SparkConf

Step 2:

#load data from hdfs

contentRDD = sc.textFile(MContent.txt")

Step 3:

#filter out non-empty lines

nonemptyjines = contentRDD.filter(lambda x: len(x) > 0)

Step 4:

#Split line based on space (Remember : It is mandatory to convert is in tuple} words = nonempty_lines.map(lambda x: tuple(x.split('', 1))) words.saveAsSequenceFile("problem86")

Step 5: Check contents in directory problem86 hdfs dfs -cat problem86/part*

Step 6 : Create key, value pair (where key is null)

nonempty_lines.map(lambda line: (None, Mne}).saveAsSequenceFile("problem86_1")

Step 7 : Reading back the sequence file data using spark. seqRDD = sc.sequenceFile("problem86_1")

Step 8 : Print the content to validate the same.

for line in seqRDD.collect():

print(line)

QUESTION NO: 72

Problem Scenario 72 : You have been given a table named "employee2" with following detail.

first_name string

last_name string

Write a spark script in python which read this table and print all the rows and individual column values.

Answer: See the explanation for Step by Step Solution and configuration.

Explanation:

Solution :

Step 1 : Import statements for HiveContext from pyspark.sql import HiveContext

Step 2 : Create sqIContext sqIContext = HiveContext(sc)

Step 3 : Query hive

employee2 = sqlContext.sql("select' from employee2")

Step 4 : Now prints the data for row in employee2.collect(): print(row)

Step 5 : Print specific column for row in employee2.collect(): print( row.fi rst_name)

QUESTION NO: 73

Problem Scenario 73 : You have been given data in json format as below.

{"first_name":"Ankit", "last_name":"Jain"}

{"first_name":"Amir", "last_name":"Khan"}

{"first_name":"Rajesh", "last_name":"Khanna"}

{"first_name":"Priynka", "last_name":"Chopra"}

{"first_name":"Kareena", "last_name":"Kapoor"}

{"first_name":"Lokesh", "last_name":"Yadav"}

Do the following activity

1. create employee.json file locally.

2. Load this file on hdfs

3. Register this data as a temp table in Spark using Python.

4. Write select query and print this data.

5. Now save back this selected data in json format.

Answer: See the explanation for Step by Step Solution and configuration.

Explanation:

Solution :

Step 1 : create employee.json tile locally.

vi employee.json (press insert) past the content.

Step 2 : Upload this tile to hdfs, default location hadoop fs -put employee.json

Step 3 : Write spark script

#lmport SQLContext

from pyspark import SQLContext

#Create instance of SQLContext sqIContext = SQLContext(sc)

#Load json file

employee = sqlContext.jsonFile("employee.json")

#Register RDD as a temp table employee.registerTempTablef'EmployeeTab"}

#Select data from Employee table

employeelnfo = sqlContext.sql("select * from EmployeeTab"}

#lterate data and print

for row in employeelnfo.collect():

print(row)

Step 4 : Write dataas a Text file employeelnfo.toJSON().saveAsTextFile("employeeJson1")

Step 5: Check whether data has been created or not hadoop fs -cat employeeJsonl/part"

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QUESTION NO: 49

How does IBM Integration Bus allow for the debugging of Pattern Projects?

A. Create a run configuration in eclipse since there is no default support in the Pattern Editor.

B. The Pattern Project is deployed to the Integration Server similar to any application and debugged from the server.

C. The Debug Pattern support in the Pattern Editor builds and launches the pattern plugin in a new Toolkit instance and stops at any breakpoints in the Java code.

D. The eclipse Run Configuration support is incompatible with the Pattern Project. The only way to test the project is to generate the plugin and install it in a separate installation of the Toolkit in a different node.

Answer: B

Explanation:

Note: The Visual Flow Debugger is implemented as an extension to the Eclipse Java debugger, so this means that if you step into a Java Compute Node, and you have the source available in your workspace you can use all the facilities of the Java debugger including viewing the content of variables during message flow execution.

References: https://developer.ibm.com/integration/docs/ibm-integration-bus/troubleshooting/diagnostic-tools/

QUESTION NO: 50

Several applications in an organization use a common Java library, commom.jar. Two applications App1 and App2 have their own shared libraries shlib1.jar and shlib2.jar that reference common.jar. Which deployment method allows for the most reuse of the Java Library?

A. Deploy all the jar files as static libraries.

B. Deploy all the jar files as part of the applications.

C. common.jar deployed as a shared library along with the shlib1.jar and shlib2.jar as shared libraries.

D. shlib1.jar and shlib2.jar must now be deployed as static libraries and common.jar as a shared library.

Answer: D

Explanation:

Consider a scenario when you want to develop a set of common resources and make them available to multiple applications.

If you want to deploy and manage just one copy of those common resources, use a shared library. A shared library can be deployed directly to an integration server. Any application can reference the resources in that deployed shared library. If that shared library is updated, the changes are immediately visible to all referencing applications.

If you want each application to use a different version of the contained resource, use a static library. Each application that references that static library is deployed with its own private copy of that library. If a static library is updated, each application that references it must be repackaged and redeployed with the updated static library.

References: https://www.ibm.com/support/knowledgecenter/en/SSMKHH_10.0.0/com.ibm.etools.mft.doc/bc23066_.htm

QUESTION NO: 51

In order for a MQEndpoint policy to use a CCDT file, what must be done in addition to setting the ccdt property?

A. Create a configurable service to specify the CCDT file path.

B. Run the mqsichangepolicy command to specify the CCDT file path.

C. Run the mqsichangeproperties command to specify the CCDT file path.

D. Set the CCDT file path as a BAR file override in any BAR file that uses the MQEndpoint policy.

Answer: C

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QUESTION NO: 12
You are implementing a VHT-capable AP. Which one of the following channels is available in the 802.11-2016 standard that was not available before the ratification of 802.11 ac?

A. 153
B. 161
C. 144
D. 56

Answer: B


QUESTION NO: 13
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?

A. OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.
B. OFDM was first introduced in 802.11 and is used by the ERP, HT and VHT PHYs as well.
C. OFDM implement BPSK modulation to allow for data rates up to 7 Gbps.
D. OFDM modulation is used only in 5 GHz 802.11 transmissions.

Answer: D
References:

QUESTION NO: 14
Which IEEE 802.11 physical layer (PHY) specification includes support for and compatibility with both ERP and HR/DSSS?

A. VHT (802.11ac)
B. OFDM (802.11a)
C. DSSS (802.11-Prime)
D. HT (802.11n)

Answer: D


QUESTION NO: 15
An 802.11-based network uses an AP and has several connecting clients. The clients include iPhones, iPads, laptops and one desktop. What WLAN use case is represented?

A. WPAN
B. Ad-hoc
C. BSS
D. IBSS

Answer: C


QUESTION NO: 16
What factor is likely to cause the least impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS?

A. Increasing or decreasing the number of spatial streams in use by the client station and AP
B. Implementation of several other clients in the same BSS using 802.11 g radios
C. Implementing Fast BSS Transition (FT) for roaming
D. RF interface from more than 10 nearby Bluetooth transmitters

Answer: A


QUESTION NO: 17
What ID is typically mapped to an AP’s MAC address if a single BSS is implemented?

A. VLAN ID
B. BSSID
C. Device ID
D. SSID

Answer: B
References:

QUESTION NO: 18
What is appended to the end of each 802.11 data frame after the payload?

A. FCS
B. Preamble
C. MAC header
D. PHY header

Answer: A


QUESTION NO: 19
When an ACK frame is not received by the transmitting STA, what is assumed?

A. The frame was correctly delivered
B. The frame was not delivered and must be retransmitted
C. The receiver is offline
D. The receiver processed the frame, but did not respond with an ACK frame because 802.11w is enabled

Answer: B