Random Qs Flashcards

1
Q

A DNS primary role is to convert______

A

An IP address to a domain name

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2
Q

how does HTTP run?

A

runs over TCP/IP and governs communication between web browsers and web servers

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3
Q

How many main DNS servers are there?

A

13 (Root Servers)

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4
Q

How many total HTTP requests does a browser send for a web page that contains four web resources: an image, a video, a CSS style sheet, and a JavaScript file?

A

5 One HTTP request is made for the HTML file, and one request is made for each resource.

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5
Q

How many total HTTP requests does a browser send for a web page that does not use any other web resources?

A

1

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6
Q

In what year did the number of Internet users surpass 3 billion?

A

2015

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7
Q

Most common HTTP methods?

A

GET, HEAD, POST, PUT, DELETE

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8
Q

Status 301

A

Moved permanently. The resource should always be requested at a different URL.

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9
Q

Status 403

A

Forbidden. the web server does not have permission to access the resource.

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10
Q

Status 500

A

Internal Server error. Something unexpected happened on the web server

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11
Q

The domain name for the requested path?

A

Host

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12
Q

What are the parts of an HTTP request/response?

A

Status line
Zero or more header fields
Empty line
Optional message body

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13
Q

What are the parts of an HTTP request/response?

A

Status line
Zero or more header fields
Empty line
Optional message body

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14
Q

What is a 404 error?

A

Page not found

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15
Q

What is a browser?

A

A program used to view HTML documents, or the World Wide Web.

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16
Q

What is a GET request?

A

Request a representation of the specified resource.

17
Q

What is a POST request?

A

Request the web server accept the message body enclosed in the request as a new resource.

18
Q

What is a PUT request?

A

Request the web server accept the message body enclosed in the request as a modification of an existing resource.

19
Q

What is a DELETE request?

A

Request the web server delete the existing resource.

20
Q

What is a HEAD request?

A

Request a response identical to GET but without the response body.

21
Q

what is a network sniffer?

A

software that monitors network traffic and allows users to inspect HTTP requests and responses

22
Q

What is a Scheme?

A

Characters at the beginning of a URL followed by a colon “:” or a colon and double slashes “://”. Common URL schemes include http, https, mailto, and file.

23
Q

What is a second-level domain?

A

the site name itself

24
Q

What is an IP address?

A

a unique string of numbers separated by periods that identifies each computer using the Internet Protocol to communicate over a network.

25
Q

What is browser cache?

A

an area on the computer’s disk where web content can be stored by the web browser for quick retrieval later.

26
Q

What is an URL?

A

Uniform Resource Locator

An address for accessing specific web data located on a server

27
Q

What is Linkrot?

A

general name for a once valid link that now return a 404 status code.

28
Q

What is the HTTP protocol?

A

A set of rules for transferring HTML files among computers

29
Q

What is the internet?

A

The interconnection of computers communicating using a set of rules

30
Q

What is the TCP/IP model?

A

Application, Transport, Internet, Network Address (Data Link and Physical)

31
Q

What is the World Wide Web Consortium?

A

The main international standards organization that traditionally has controlled a number of web standars, including HTML.

32
Q

What is WHATWG?

A

an organization that develops a variety of web standards (2019)and whose members include the major browser vendors.

33
Q

Which status code is sent when the web server wants to redirect the browser to a different URL?

A

301 OR 302

34
Q

Who was Tim Berners-Lee?

A

He invented the World Wide Web

35
Q

what is https

A

sends requests and responses that are readable only by the client and server - uses a secure protocol to encrypt

36
Q

[Entity Formats]

© aka copy;

A

copy right symbol

37
Q

[Entity Formats]

“nbsp;”

A

non-breaking space

38
Q

[Entity Formats]

† aka dagger;

A

dagger char

39
Q

[Entity Formats]

— aka mdash;

A

em char - long dash