Book Resume 6- 7 Devasc

Question 1

Are often used for communication from a network controller to its management
software. For example, Cisco DNA Center has a software graphical user interface
(GUI) that is used to manage its own network controller.

Answer 1

Northbound APIs

Question 2

If a network operator makes a change to a switch’s configuration in the management software
of the controller, those changes will then be pushed down to the individual devices
using a

Answer 2

Southbound APIs

Question 3

Causes an application to wait for a response from the API in order to continue
processing data or function normally.

Answer 3

Synchronous APis

Question 4

Provide a callback function so that the API response can be sent back at
another time, without the application having to wait for the entire transaction to complete.

Answer 4

Asynchronous APIs

Question 5

Use HTTP methods
to gather and manipulate data. Because there is a defined structure for how HTTP works,
HTTP offers a consistent way to interact with APIs from multiple vendors.

Answer 5

Restful APIs

Question 6

Is a predetermined string that
is passed from the client to the server. It is intended to be a pre-shared secret and should
not be well known or easy to guess because it functions just like a password.

Answer 6

API Key

Question 7

An API key can be passed to the server in three
different ways:

Answer 7

String
■■ Request header
■■ Cookie

Question 8

Allows a user to enter his or her username and password once and receive
a unique auto-generated and encrypted xxxxxx.

Answer 8

Custom Tokens

Question 9

Is used to exchange data between applications that were
built on different programming languages, such as Java, .NET, and PHP

Answer 9

Simple Object Access Protocol
SOAP

Question 10

SOAP messages, which typically consist of the following four main components,
are sent between the web applications and the clients

Answer 10

■■ Envelope
■■ Header
■■ Body
■■ Fault (optional)

Question 11

Make it possible to execute code or a program on a remote
node in a network

Answer 11

Remote-Procedure Calls (RPCs)

Question 12

Enumere the APIs Styles:

Answer 12

Rest, Sincronic, Asincronic, Remote Procedural Calls (RPC)

Question 13

RESTful API Authentication

Answer 13

Basic Authentication, APIs Keys, Custom Tokens.

Question 14

-Is one of the simplest and most common
authentication methods used in APIs.

Answer 14

Basic Authentication.

Question 15

Is a set of functions and procedures intended
to be used as an interface for software components to communicate with each other.

Answer 15

An application programming interface (API)

Question 16

Describe the APIs clasification:

Answer 16

• Service APIs
• Information APIs
• Hardware APIs

Question 17

An application can call on another application to solve a
particular problem (see Figure 7-2). Usually these systems can exist independently. For
example, in a payment system, an application can call the API to accept payments via
credit cards.

Answer 17

Service APIs

Question 18

Allows one application to ask another application
for information. Information in this context can refer to data gathered over time,
telemetry data, or a list of devices that are currently connected.

Answer 18

Information APIs

Question 19

Gain access to the features
of hardware devices. Usually these APIs encompass some kind of hardware or
sensors, and an application can call this kind of API to get the GPS location or realtime
sensor data such as temperature or humidity.

Answer 19

Hardware APIs

Question 20

API Access Types
There are typically three ways APIs can be accessed:

Answer 20

1/ Private
2/ Partner
3/ Public

Question 21

In HTTP, in order to make a successful request to the server, the client needs to include four
items:

Answer 21

■■ URL (uniform resource locator)
■■ Method
■■ List of headers
■■ Body

Question 22

A URL typically has four components,

Answer 22

■■ Protocol
■■ Server/host address
■■ Resource
■■ Parameters

Question 23

Are user-defined HTTP callbacks. Are Triggered by an event, such as pushing code to a repository or typing a keyword in a chat window.

Answer 23

Webhooks

Question 24

REST Constraints

Answer 24

** Client/server
■■ Stateless
■■ Cache
■■ Uniform interface
■■ Layered system
■■ Code on demand

Question 25

Each individual request contains all the information the
server needs to perform the request and return a response, regardless of other requests made
by the same API user.

Answer 25

Stateless (REST)

Question 26

In this strategy, the version number of the API is included in the
URL path.

Answer 26

URI path versioning

Question 27

In this strategy, the version number is sent as a
query parameter in the URL.

Answer 27

Query parameter versioning

Question 28

Are versioned by providing custom headers with the version
number included as an attribute.

Answer 28

Custom headers: REST APIs

Question 29

This strategy allows you to version a single resource representation
instead of versioning an entire API

Answer 29

Content negotiation

Question 30

What are the populars aproch to pagination?

Answer 30

■■ Offset-based pagination
■■ Keyset-based pagination, also known as continuation token or cursor pagination (recommended)