O-LevelComputer ScienceThe Internet and its uses2210/11 · May/June 2023 · Q1014 Marks

A student uses the internet for their schoolwork to research what is meant by pharming.

(a)State the aim of pharming.[1]
(b)Draw and annotate a diagram to represent the process of pharming.[4]
(c)The student uses a web browser to access data on the internet. Explain the purpose of the web browser.[2]
(d)Storing cookies is one function of the web browser. Give three other functions of the web browser. 1 2 3[3]
(e)A student visits a website that uses session cookies, instead of persistent cookies. Explain the difference between session cookies and persistent cookies.[4]

Mark scheme

Marking points from the official mark scheme (May/June 2023). The mark or mark type is shown in brackets.

[1] • To obtain personal data/details // by example
[4] One mark for each correct part of the diagram. Diagram shows: • User clicks/opens attachment/link that triggers download • Malicious software downloaded onto user's computer • User enters website address • User is redirected to fake website
[2] Two from: Displays web pages ... by rendering HTML
[3] Any three from: e.g. • Storing bookmarks/favourites • Recording user history • Allowing use of multiple tabs • Providing navigation tools // by example • Providing an address bar • Managing protocols // by example // checking digital certificate • Send URL to DNS • Sends a request to the IP address/web server (to obtain the contents of a webpage) • Runs active script/JavaScript/client-side script • Allows files to be downloaded from website/internet
[4] Any four from: • Session cookies are stored in memory/RAM • ... whereas persistent cookies are stored on the hard drive/secondary storage • When the browser is closed a session cookie is lost • ... whereas a persistent cookie is not lost • ... until deleted by the user/they expire

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