CCNP ENCOR v8 Chapters 27 – 29: Virtualization, Automation, and Programmability Test Online

Hint

A virtual machine is a software emulation of a physical server including a CPU, memory, network interface, and operating system.

Hint

In a virtualized server the vSwitch is connected to external networks through physical NICs (pNICs) and to VMs through virtual NICs (vNICs).

Hint

Within the ETSI NFV architectural framework, it is the virtualized infrastructure manager that is responsible for managing and controlling the NFVI hardware resources of compute, storage, and network, and the virtualized resources.

Hint

In the ETSI NFV architectural framework the NFV orchestrator and VNF manager together are known as NFV management and orchestration (MANO).

Hint

The vSwitch is responsible for moving data from the network stack and sending it to the vNIC of the VM.

Hint

The hypervisor is virtualization software that performs hardware abstraction. It allows multiple VMs to run concurrently in the virtual environment.

Hint

The Cisco DNA Center provides the VNF management and orchestration (MANO) functionality to the Cisco Enterprise NFV solution.

Hint

PCI Passthrough was developed to increase packet throughput in an OVS environment. However, the downside to PCI Passthrough is that each pNIC is dedicated to a single VNF.

Hint

In the ETSI NFV achitectureal framework, the operations support system (OSS) supports network systems and services while the business support system (BSS) runs business operations.

Hint

CRUD is an acronym that stands for CREATE, READ, UPDATE, and DELETE. The HTTP functions that correspond to CRUD functions are as follows:

• GET -> READ
• POST -> CREATE
• PUT/PATCH -> UPDATE
• DELETE -> DELETE

Hint

A JSON array is a collection of ordered values within square brackets [ ]. The values in the array are separated by a comma. For example “users” : [“bob”, “alice”, “eve”].

Hint

Common data formats that are used in many applications including network automation and programmability include these: JavaScript Object Notation (JSON) – In JSON, the data known as an object is one or more key/value pairs enclosed in braces { }. Keys must be strings within double quotation marks ” “. Keys and values are separated by a colon. eXtensible Markup Language (XML) – In XML, the data is enclosed within a related set of tags data. YAML Ain’t Markup Language (YAML) – In YAML, the data known as an object is one or more key value pairs. Key value pairs are separated by a colon without the use of quotation marks. YAML uses indentation to define its structure, without the use of brackets or commas.

Hint

The HTTP POST function is used to send the credentials to the Cisco DNA Center controller. The Cisco DNA Center uses basic authentication to pass a username and password to the Cisco DNA Center Token API to authenticate users.

Hint

The leaf named observed-speed cannot be configured due to the config false command. The speeds in this leaf are auto-detected (observed); hence, it is not a configurable leaf.

Hint

GitHub is a hosted web-based repository for code. It has capabilities for bug tracking, version control, and task management. Using GitHub is one of the easiest ways to track changes in program files, collaborate with other developers, and share code with the online community.

Hint

In network automation applications, when a network operator makes a change to the configuration of a network device in the management software of the controller, those changes are pushed down to the individual devices by using a southbound API. These devices can be routers, switches, or even wireless access points.

Hint

Common data formats that are used in many applications including network automation and programmability include these: – JavaScript Object Notation (JSON) – In JSON, the data known as an object is one or more key/value pairs enclosed in braces { }. Keys must be strings within double quotation marks ” “. Keys and values are separated by a colon. – eXtensible Markup Language (XML) – In XML, the data is enclosed within a related set of tags

data

. – YAML Ain’t Markup Language (YAML) – In YAML, the data known as an object is one or more key value pairs. Key value pairs are separated by a colon without the use of quotation marks. YAML uses indentation to define its structure, without the use of brackets or commas.

Hint

The connection between a remote workstation and a network device in a company location can be secured by establishing an SSH or VPN connection first, because both solutions provide encrypted data transmission.

Hint

Postman is an application that makes it possible to interact with APIs using a console-based approach. Postman allows for the use of various data types and formats to interact with REST-based APIs.

Hint

A single equal sign is used to assign a variable. This program should use double equal signs to check equality.

Hint

There are several types of deployment models for the Chef server. Chef Solo: The Chef server is hosted locally on the workstation. Chef client and server: This is a typical Chef deployment with distributed components. Hosted Chef: The Chef server is hosted in the cloud. Private Chef: All Chef components are within the same enterprise network.

Hint

The configuration management tool Puppet uses the name Manifest to describe the set of instructions to be executed.

Hint

The SaltStack agent that runs on nodes is called a minion. SaltStack grains run on the minions to gather information and report back to the SaltStack master.

Hint

The Cisco Embedded Event Manager (EEM) is a Cisco IOS tool that uses software applets to automate tasks on a Cisco device. EEM is completely contained within the local device and needs no external scripting or monitoring device.

Hint

Ansible uses an agentless approach. Chef, Puppet, and SaltStack are agent-based.

Hint

There are several types of deployment models for the Chef server. Chef Solo: The Chef server is hosted locally on the workstation. Chef Client and Server: This is a typical Chef deployment with distributed components. Hosted Chef: The Chef server is hosted in the cloud. Private Chef: All Chef components are within the same enterprise network.

Hint

The Cisco Embedded Event Manager (EEM) is a Cisco IOS tool that uses software applets to automate tasks on a Cisco device. EEM is completely contained within the local device and needs no external scripting or monitoring device.

Hint

Ansible playbooks are written in YAML, which uses dictionaries similar to JSON in the use of key/value pairs.

Hint

CRUD is an acronym that stands for CREATE, READ, UPDATE, and DELETE. For example, in a SQL database, the CRUD functions are used to interact with or manipulate thedata stored in the database.

Hint

A virtual machne ts a software emulation of a physical server including a CPU, memory, network interface, and guest operating system

Hint

JavaScript Object Notation (JSON) is a data format used by applications to store and transport data.