Scripting

Which type of configuration is represented in the output

• Ansible

• Chef

• JSON

• Puppet

Answer explanation

"Puppet code is done in modules. Each module manages a specific task in the infrastructure such as installing and configuring a piece of software." Modules are reusable and shareable. Sample of resource declaration:

<TYPE> { '<TITLE>:
<ATTRIBUTE> => <VALUE>,
<ATTRIBUTE> => <VALUE>,
}

Which technology is appropriate for communication between a SDN controller and applications running over the network?

• OpenFlow

• REST API

• NETCONF

• Southbound API

Answer explanation

Southbound communications is between SDN and switches/routers: Higher level to lower level: OpenFlow, SNMP, OpFlex, OSPF, NETCONF

Northbound communication is between SDN and applications: Lower level to higher level: REST API, RESTCONF

What are two improvements provided by automation for network management in an SDN environment? (Choose two.)

• Data collection and analysis tools establish a baseline for the network

• AI identifies and prevents potential design failures

• Machine learning minimizes the overall error rate when automating troubleshooting processes

• New devices are onboarded with minimal effort

• Proprietary Cisco APIs leverage multiple network management tools

Which purpose does a northbound API serve in a controller-based networking architecture?

• Communicates between the controller and the physical network hardware

• Reports device errors to a controller

• Generates statistics for network hardware and traffic

• Facilitates communication between the controller and the applications

What are two benefits of network automation? (Choose two.)

• Reduced hardware footprint

• Reduced operational costs

• Faster changes with more reliable results

• Fewer network failures

• Increased network security

Which two encoding methods are supported by REST APIs? (Choose two.)

• YAML

• JSON

• EBCDIC

• SGML

• XML

Answer explanation

The API accepts and returns HTTP (not enabled by default) or HTTPS messages that contain JavaScript Object Notation (JSON) or Extensible Markup Language (XML) documents.

Which software defined architecture plan assists network devices with making packet forwarding decisions by providing Layer 2 reachability and Layer 3 routing information?

• Data plane

• Control plane

• Policy plane

• Management plane

Answer explanation

The control plane controls "how" data is forwarded.

The data plane controls the actual forwarding process.

Which CRUD operation corresponds to the HTTP GET method?

• Read

• Update

• Create

• Delete

Answer explanation

Both POST and PUT sends data. POST is idempotent (eeedempotent a function/operation that can be performed multiple times without changing the result). Assume you are designing an API for asking questions. Use POST if you would send that data to a list of questions. Use PUT if you would do that to a particular question.

Which two components are needed to create an Ansible script that configures a VLAN on a switch? (Choose two.)

• Cookbook

• Task

• Playbook

• Model

• Recipe

Answer explanation

An Ansible playbook is a list of things to do from top to bottom to get something done. It is an automation blueprint in YAML format.

A play is a list of tasks that maps to managed nodes.

A task is a list of one or more modules that defines the operations that Ansible performs.

A module is a unit of code that Ansible runs on nodes.

What are two southbound APIs? (Choose two.)

• OpenFlow

• NETCONF

• Thrift

• CORBA

• DSC