juniper.testking.jn0-410.v2017-04-11.by.villy€¦ · b. enterprise customers migrating to 802.11ac...

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JN0-410.exam

Number: JN0-410Passing Score: 800Time Limit: 120 minFile Version: 1.0


JuniperJN0-410

Juniper Networks – SDN and Automation, Specialist (JNCIS-SDNA)

Version 1.0


Exam A

QUESTION 1Click the Exhibit button.

Within your Contrail cluster, a BGP peer is not advertising routes as expected. After issuing the curl http://<host ip address>:8081/analytics/uves/bgp-peers command, you receive the output shown in the exhibit.

What is causing this problem?

A. an incorrect peer type

B. an incorrect local ID

C. an incorrect family

D. an incorrect IP address

Correct Answer: CSection: (none)Explanation


Explanation/Reference:References:https://www.juniper.net/techpubs/en_US/contrail3.0/topics/task/troubleshooting/debug-bgp-peering-vnc.html

QUESTION 2Which two networking trends are addressed by SDN? (Choose two.)


A. centralized management of Spanning Tree Protocol for traffic control

B. enterprise customers migrating to 802.11ac Wave 2 WiFi connectivity

C. cloud services providing on-demand access to IT resources

D. bring your own device (BYOD) networking

Correct Answer: CDSection: (none)Explanation

Explanation/Reference:

QUESTION 3What are tenants called in OpenStack?

A. sites

B. areas

C. projects

D. domains




QUESTION 4Which role does Contrail serve in SDN?

A. orchestrator

B. controller

C. gateway

D. fabric

Correct Answer: BSection: (none)Explanation


QUESTION 5Contrail plugs into which two OpenStack components? (Choose two.)

A. Cinder

B. Swift

C. Horizon

D. Neutron

Correct Answer: ADSection: (none)Explanation


QUESTION 6What are three ways to deploy an MX Series device as an SDN gateway? (Choose three.)



A. Configure as an SDN-to-SDN gateway.

B. Configure as an L4 gateway.

C. Configure as an L2 gateway.

D. Configure as an L3 gateway.

E. Configure as an application gateway.

Correct Answer: ACDSection: (none)Explanation

Explanation/Reference:References:https://forums.juniper.net/t5/Data-Center-Directions/Connecting-Islands-of-Resources-in-an-SDN-Data-Center/ba-p/214445

QUESTION 7You are decommissioning a Contrail compute node.

Which two steps accomplish this task? (Choose two.)

A. Remove the information about this detached compute node from the existing testbed.py file.

B. Issue the fab detach_vrouter _node: root@<server ip-address> command from a Contrail control node.

C. Uninstall the Contrail vRouter from the compute node being decommissioned.

D. Delete the testbed.py file associated with the compute node.

Correct Answer: ABSection: (none)Explanation

Explanation/Reference:References:https://www.juniper.net/techpubs/en_US/contrail2.1/topics/task/installation/add-new-compute-node-vnc.html

QUESTION 8Which two programming languages in the Contrail API libraries are made available as packages? (Choose two.)

A. Go

B. Python

C. Perl

D. SLAX


Correct Answer: ABSection: (none)Explanation

Explanation/Reference:References:https://github.com/Juniper/contrail-controller/wiki/Contrail-API

QUESTION 9What is the function of an NFV Orchestrator?

A. It coordinates the life cycle of VNFs that jointly instantiate a network service.

B. It manages the infrastructure.

C. It manages the NFVI compute, storage, and network resources in the cloud data center.

D. It is responsible for service life-cycle management, including instantiating, scaling, upgrading, downgrading, modifying, and terminating VNFs.

Correct Answer: ASection: (none)Explanation

Explanation/Reference:References:http://www.juniper.net/assets/kr/kr/local/pdf/whitepapers/2000633-en.pdf Page: 3

QUESTION 10Using the console, you cannot connect into a running instance within the Horizon GUI. You have confirmed that the corresponding compute node hosting theinstance is running, and that the instance has an operational status.

What is preventing you from connecting to the running instance in this scenario?

A. the testbed.py script

B. the Heat Template

C. the nova-consoleauth service

D. the supervisor-vrouter service




QUESTION 11You are installing a Contrail and OpenStack cluster.

What is the correct order of installation steps for this task?


A. Unpack the Contrail packages, update testbed.py, upgrade the kernel install Contrail, and setup all.

B. Unpack the Contrail packages, update testbed.py, install Contrail, setup all, and upgrade the kernel.

C. Unpack the Contrail packages, install Contrail, upgrade the kernel, update testbed.py, and setup all

D. Unpack the Contrail packages, update testbed.py, upgrade the kernel, setup all, and install Contrail.



QUESTION 12Which SDN solution allows the control plane to remain on legacy hardware as a stop-gap measure until you are ready to replace the current hardware?

A. SDN as an overlay

B. open SDN

C. SDN using NVGRE

D. SDN using an API




QUESTION 13Before creating a virtual network for your Contrail project, what must you create to enable the utilization of network resources?

A. IP address management (IPAM)

B. a domain name

C. Domain Name Service (DNS)

D. Network Time Protocol (NTP) server


Explanation/Reference:References:https://www.juniper.net/techpubs/en_US/contrail2.2/topics/task/configuration/creating-virtual-network-juniper-vnc.html

QUESTION 14Which protocol do configuration nodes use to send low-level configuration information to control nodes?

A. MBGP

B. XMPP

C. Sandesh

D. IF-MAP

Correct Answer: DSection: (none)Explanation

Explanation/Reference:References:http://www.juniper.net/us/en/local/pdf/whitepapers/2000535-en.pdf Page: 24

QUESTION 15Which component of an SDN controller allows developers to write applications that program the forwarding elements?

A. southbound interface

B. northbound interface

C. forwarding plane


D. control plane



QUESTION 16What information is contained in an OpenStack flavor?

A. instance disk space and RAM allocation information

B. IP addressing and IPAM information

C. project and user rights information

D. virtual network and policy information


Explanation/Reference:References:https://docs.openstack.org/admin-guide/cli-manage-flavors.html

QUESTION 17A service provider wants to provide a dynamic service offering employing NFV.

Which Juniper solution meets this requirement?


A. vNAS

B. vNIC

C. vCPU

D. vCPE



Explanation/Reference:References:https://www.juniper.net/techpubs/en_US/nfv1.5/topics/concept/ccpe-nfv-overview.html



Referring to the exhibit, what does enabling Service Scaling allow?

A. The system will monitor an instance's resources.

B. The system permits multiple instances for a service instance using the template.

C. The system may use Heat Orchestration Templates.

D. The system instantiates additional instances if a defined threshold is exceeded.


Explanation/Reference:References:http://www.juniper.net/documentation/en_US/contrail3.0/topics/task/configuration/service-chaining-example-ui.html

QUESTION 19What are two advantages of SDN? (Choose two.)

A. centralized management

B. decentralized management

C. programmability

D. static networking

Correct Answer: ACSection: (none)Explanation




Referring to the information shown in the exhibit, which statement about the VMs is true?

A. They are on the same physical hardware.

B. They have the same default gateway.

C. They are on the same subnet.

D. They have produced little traffic.





Referring to the command shown in the exhibit, which two statements are true? (Choose two.)

A. A snapshot is being launched.

B. A custom flavor is used.

C. A default flavor is used.

D. A snapshot is being created.

Correct Answer: BDSection: (none)Explanation


QUESTION 22Which two statements describe the default network policy in OpenStack? (Choose two.)

A. UDP, TCP, and ICMP are permitted.

B. Both IPv4 and IPv6 are permitted.

C. Only IPv4 is permitted.

D. Only UDP and TCP are permitted.



QUESTION 23


You are troubleshooting an issue within your Contrail cluster and need to align the statistical and event information from the virtual overlay network with the physicalunderlay network, consisting of QFX Series devices.

Which three protocols must be enabled on each device in the topology to accomplish this task? (Choose three.)


A. SRTP

B. sFlow

C. SNMP

D. RMON

E. LLDP

Correct Answer: BCESection: (none)Explanation


QUESTION 24Which protocol does Contrail use to exchange information between the Contrail Controller and the Contrail vRouter?

A. BGP

B. SSH

C. XMPP

D. NETCONF


Explanation/Reference:References:http://www.juniper.net/us/en/local/pdf/whitepapers/2000535-en.pdf Page: 6


QUESTION 25Which statement about Contrail Device Manager is true?

A. It manages virtual devices using NETCONF.

B. It manages hardware devices using YANG.

C. It manages hardware devices using NETCONF.

D. It manages virtual devices using YANG.



QUESTION 26What is the default time to live off of data stored in the Contrail Analytics database?

A. 72 hours

B. 24 hours

C. 48 hours

D. 168 hours


Explanation/Reference:References:https://www.juniper.net/techpubs/en_US/contrail3.1/topics/concept/analytics-overview-vnc.html

QUESTION 27As the administrator of your company's Contrail environment, you are periodically asked to import new images into the OpenStack environment.

Which two statements are true in this scenario'? (Choose two.)

A. RAW is a supported disk format when importing images into this environment.

B. OVF is a supported disk format when importing images into this environment.

C. You can use the swift upload command in perform this task.


D. You can use the glance image-create command to perform this task.


Explanation/Reference:References:https://docs.openstack.org/user-guide/common/cli-manage-images.html

QUESTION 28Prior to installing Contrail, which list of settings must be verified on all participating servers?

A. time synchronization, hostname resolution, and that SSH is enabled

B. time synchronization, hostname resolution, and that FTP is enabled

C. DHCP is enabled, hostname resolution, and that SSH is enabled

D. DHCP is enabled, hostname resolution, and that FTP is enabled


Explanation/Reference:References:http://www.juniper.net/techpubs/en_US/contrail2.0/information-products/pathway-pages/getting-started.pdf Page:46-47

QUESTION 29What are two networking components of OpenStack? (Choose two.)

A. Barbican

B. Nova

C. Ironic

D. Neutron




QUESTION 30If the Contrail controller is the control plane, which component acts as the data plane?

A. vRouter

B. vSwitch

C. vSphere

D. vMX



QUESTION 31You are troubleshooting traffic flows through a Contrail environment and need to inspect traffic entering and leaving an interface for a given instance.

Which three tasks meet this objective? (Choose three.)


A. Determine the tap interface through which the traffic flows.

B. Perform a TCP dump on the identified interface.

C. Determine the vhost0 interface through which the traffic flows.

D. Identify the compute node hosting the instance.

E. Identify the control node peering with the instance.

Correct Answer: ABDSection: (none)Explanation



QUESTION 32What are two modes of service chaining that Contrail implements? (Choose two.)

A. interface analyzer

B. transparent

C. in-network-nat

D. analytic

Correct Answer: BCSection: (none)Explanation

Explanation/Reference:References:https://www.juniper.net/techpubs/en_US/contrail3.1/topics/task/configuration/service-chaining-vnc.html

QUESTION 33What are two ways to install Contrail? (Choose two.)

A. Use Device Manager.

B. Use Server Manager.

C. Use fab scripts.

D. Use Contrail APIs.

Correct Answer: BCSection: (none)Explanation



$ nova flavor-create -–is-public true vsrx_flavor auto 4096 16 2

What information about the Nova flavor creation is shown in the exhibit?

A. The RAM shown is displayed in GB.

B. The image flavor contains two virtual NICs.


C. Every instance created from this flavor will have two virtual CPUs.

D. The image flavor is private to the specific project the user is working on.


Explanation/Reference:References:https://www.juniper.net/techpubs/en_US/vsrx15.1x49/topics/task/multi-task/security-vsrx-contrail-flavors.html


You are deploying a service chain with a vSRX as the Service VM shown in the exhibit. You notice that there is no traffic passing through the vSRX even though youhave created policies within the vSRX to allow traffic.

After reviewing the routing, what should you verify?

A. virtual networks

B. service template

C. network policy

D. service instance




QUESTION 36Which statement about a Contrail environment is true?

A. All compute nodes include a vRouter.

B. All control nodes include a vRouter.

C. All analytic nodes include a vRouter.

D. All config nodes include a vRouter.



QUESTION 37You are creating a service template using the CLI.

Which three elements are required to accomplish this task? (Choose three.)


A. project name

B. service type

C. policy name

D. image name

E. template name

Correct Answer: BDESection: (none)Explanation

Explanation/Reference:References:https://www.juniper.net/techpubs/en_US/contrail2.0/topics/task/configuration/service-chaining-example-vnc.html#jd0e56


QUESTION 38You are troubleshooting a Contrail environment and need to verify the version information on all participating nodes.

Which two actions accomplish this task'? (Choose two.)

A. Issue the contrail-version on command on each participating node.

B. Issue the fab all_version command on each participating node from the /opt/contrail/utils directory.

C. Issue the contrail-version command on the config node.

D. Issue the fab all_version command on the config node from the /opt/contrail/utils directory.



QUESTION 39You have an OpenStack environment and a compute instance has crashed. You attempt to restart the AWM instance and you receive the message shown below.

Invalid: Instance has already been createdInstanceNotFound: Instance AWM could not be found.

What does this message indicate?

A. The instance is headless.

B. Keystone has a corrupted lock file for the instance.

C. The database has an invalid identifier for the instance.

D. The instance is stuck in an inactive state.


Explanation/Reference:References:http://networkstatic.net/troubleshooting-common-openstack-errors/

QUESTION 40When customizing and managing OpenStack flavors, what are two definable configuration elements? (Choose two.)


A. vCPUs

B. networks

C. ephemeral

D. nodes


Explanation/Reference:References:https://docs.openstack.org/admin-guide/compute-flavors.html


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