MODULE 4 Flashcards
A web service uses a rate limit algorithm that puts all incoming REST API requests into a queue in the order in which they arrive. The algorithm allows incoming requests to arrive at any rate, but the server processes the requests from the queue at a fixed rate. Which rate limit algorithm is used by the web service?
Token bucket
Fixed window counter
Sliding window counter
Leaky bucket
Leaky bucket
Which API architectural style uses an XML-based messaging protocol to communicate between applications?
SOAP
REST
NFS
XML-RPC
SOAP
Which HTTP response status code indicates that the user is not authenticated to access the site?
201
400
401
403
404
401
What is an architectural constraint to which a true RESTful API web service must adhere?
It operates as a cloud service.
It runs as client/server model.
It uses HTTPS to transport data.
It must support the XML data format.
It runs as client/server model.
Which type of credential information is used for the bearer authentication in REST APIs?
a username and password set by the client
a password encoded using Base64
an MD5 hash string generated by the client application
a string generated by an authentication server
a string generated by an authentication server
What is REST?
It is an architecture style for designing web service applications.
It is a way to store and interchange data in a structured format.
It is a human readable data structure that is used by applications for storing, transforming, and reading data.
It is a protocol that allows administrators to manage nodes on an IP network.
It is an architecture style for designing web service applications.
A network engineer is learning about Rest APIs. When executing a particular API, the server responds with curl. How is this information useful?
Curl shows the retrieved information in JSON format
Curl shows how to access the content displayed in the response body using curl.
Curl shows the information the API returned from the server.
Curl shows the URL used in the API request.
Curl shows how to access the content displayed in the response body using curl.
What is an architectural constraint to which a true RESTful API web service must adhere?
It operates in a stateless way.
It uses HTTPS to transport data.
It must operate along with a DNS server.
It operates as a cloud service.
It operates in a stateless way.
In which situation would a synchronous API be used?
when a server is not part of the process
when the original API request or data from the request is delayed
when data is being retrieved from a database
when the client is not required to take action
when data is being retrieved from a database
What is a characteristic of a RESTful API?
It uses HTTP methods to gather and manipulate data.
It is a southbound API.
It facilitates the configuration changes from a network controller to end devices.
It supports a secure data transmission between a remote user and an enterprise network.
It uses HTTP methods to gather and manipulate data.
What are two purposes for using rate limits on public and unrestricted APIs? (Choose two.)
to avoid a server overloading from too many requests at the same time
to limit the number of authorization requests per API call
to provide better service and response time to all users
to ensure a client uses a multifactor authentication mechanism
to limit the number of passwords that a client can have in making API requests
to avoid server overloading from too many requests at the same time
to provide better service and response time to all users
Which RESTful operation corresponds to the HTTP GET method?
Read
Update
Patch
Post
Read
As part of creating an API request using Python, the following commands are entered. What is the purpose of this step?
ipaddr = 10.1.50.1
interface = Ethernet1/1
hostname = R1
To create variables
To request JSON data
To import Python modules
To create functions to test the code
To create variables
What is a webhook for REST APIs?
It is an HTTP PUT message to update information on a website.
It is an HTTP redirect to forward the API request to another web service.
It is an HTTP callback to a URL to notify the client application that an event has occurred.
It is an HTTP UPDATE message to notify the user that an API request is successfully completed.
It is an HTTP callback to a URL to notify the client application that an event has occurred.
What is a reason that a network engineer would use APIs?
To automate configuration or data collection tasks
To provide a more robust security architecture
To facilitate features across network devices that operate at different layers
To provide upper management with information about network performance
To automate configuration or data collection tasks
Which SOAP message root element define the XML document as a SOAP message?
Meta tag
Body
Envelope
Header
Envelope
What is the meaning of the term flow as it relates to the OAuth 2.0 authorization framework?
It is the number of requests contained in the token bucket.
It is a process for an API request to send authentication credentials to a web service.
It is a process for an API user to obtain an access token from the authorization server.
It is the sequence of data exchanged between a REST API request and a response.
It is a process for an API user to obtain an access token from the authorization server.
In the REST API request URI example http://example.com/update/person?id=42&email=person%40example.com , which term describes the component example.com ?
query
path
scheme
authority
authority
What is an application requirement in order to receive a notification from a webhook provider?
The application must provide a syslog service.
The application must always be running to receive HTTP POST requests.
The application must register a unique domain name from a certificate authority.
The application must accept HTTP UPDATE messages from the webhook provider.
The application must always be running to receive HTTP POST requests.
Which HTTP response status code indicates that the request to update the database is completed?
200
201
400
401
403
404
201
A client is sending a REST API request to a web server. The request includes the need for data compression. Which three values are acceptable for the Accept-Encoding request header? (Choose three.)
*
xz
br
gzip
tar
zip
*
br
gzip
Which characteristic of the SOAP architecture specifies communication between all similar and dissimilar application types?
independence
interface uniformity
neutrality
extensibility
independence
How many elements does a SOAP message contain?
2
3
4
5
4
Which type of encoding is used in basic authentication for REST APIs?
UTF-8
UTF-16
Base32
Base64
Base64
