Computer Science - 0478 CIE

The Internet And The World Wide Web

Gbogbo ọrọ náà

People say 'the internet' and 'the web' as if they mean the same thing, but they do not. One is a global network of cables and devices; the other is the collection of web pages that ride on top of it. Knowing the difference, and the exact chain of events that turns a typed address into a displayed page, is at the heart of this topic.

In this lesson you will learn what a URL is, how HTTP and HTTPS differ, what a web browser does, the step-by-step journey from typing a URL to seeing a page (including the role of the DNS), and how session and persistent cookies remember things about you.

Ebumnobi

  1. 1 Understand the difference between the internet and the world wide web
  2. 2 Understand what is meant by a uniform resource locator (URL)
  3. 3 Describe the purpose and operation of hypertext transfer protocol (HTTP) and hypertext transfer protocol secure (HTTPS)
  4. 4 Explain the purpose and functions of a web browser
  5. 5 Describe how web pages are located, retrieved and displayed on a device when a user enters a URL
  6. 6 Explain what is meant by cookies and how they are used, including session cookies and persistent cookies

Nkuzi Olu

Gee ntị na nkuzi a na ngwa

Maapụ uche

E seela isiokwu a ka ị hụ otu echiche si ejikọta.

Mepee maapụ uche na ngwa

Kaadị ncheta

Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.

Mee omume kaadị ndị a na ngwa

Akwụkwọ Ọmụmụ

Almost everything you do online involves a browser fetching a web page over the internet. Understanding the difference between the internet and the web, and the precise sequence that retrieves a page, lets you explain what is happening behind a click and why a secure padlock matters. These are favourite exam topics and reward clear, ordered answers.

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Nnyocha Ọmụmụ

Ekele diri gi maka imecha ihe karịrị na The Internet And The World Wide Web. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.

Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.

Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.

  1. What is the world wide web? A. the global network of cables and devices B. the collection of web pages and websites C. a web browser D. a protocol Answer: B
  2. Which protocol encrypts the data transferred between browser and server? A. HTTP B. HTTPS C. DNS D. URL Answer: B
  3. What does a DNS do? A. renders web pages B. maps a domain name to an IP address C. stores cookies D. encrypts data Answer: B
  4. A session cookie is deleted when: A. the user logs in B. the web browser is closed C. the page is reloaded D. it is sent to the server Answer: B
  5. Which is NOT one of the three main parts of a URL? A. protocol B. domain name C. IP address D. web page or file name Answer: C

Rue ajuju ndi a n'ime ngwa ahu

Rue ajuju ndi a n'ime ngwa ahu

Meecha Ajụjụ Ule Ọmarịcha

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