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2210 · 0478Paper 1 · Computer Systems§5.1, §5.2, §5.3

5. The Internet and Its Uses

Internet vs World Wide Web, URLs, HTTP/HTTPS, browsers, cookies, blockchain, cyber security threats and how to stop them.

Statometer72CoreNext Paper 187%
Marks a paper12 · 16%Rank#6 of 10 · #4 on P1Trend · last 12Oct/Nov 24 · 13: 16 marksFeb/Mar 25 · 12: 14 marksMay/Jun 25 · 11: 10 marksMay/Jun 25 · 12: 0 marksMay/Jun 25 · 13: 16 marksOct/Nov 25 · 11: 16 marksOct/Nov 25 · 12: 14 marksOct/Nov 25 · 13: 12 marksFeb/Mar 26 · 12: 22 marksMay/Jun 26 · 11: 10 marksMay/Jun 26 · 12: 10 marksMay/Jun 26 · 13: 5 marks
9 in 10 chance in the next paper

Everything for this topic — study hub

O Level / IGCSE · 2210 · 0478 · Paper 1

Statometer — what 25 real papers say about this topic and each of its 3 syllabus bullets

Core · #6 of 10 in O Level / IGCSE · recomputed with every new session

72CORE
Core#6 of 10 in O Level / IGCSE#4 on Paper 1 Easing

A regular, well-paid topic — you cannot afford a gap here.

Next Paper 1
87%
9 in 10 chance it is set
Marks a paper
12 / 75
16% of Paper 1 · fair share 17%
Appeared in
23 / 25
Paper 1 sittings 20232026
Last set
May/Jun 2026
0478/13 · Q7 · 5 marks · 11-series streak
Marks in each of the last 12 Paper 1 sittingsOct/Nov 24May/Jun 26
Oct/Nov 24 · 13: 16 marksFeb/Mar 25 · 12: 14 marksMay/Jun 25 · 11: 10 marksMay/Jun 25 · 12: 0 marksMay/Jun 25 · 13: 16 marksOct/Nov 25 · 11: 16 marksOct/Nov 25 · 12: 14 marksOct/Nov 25 · 13: 12 marksFeb/Mar 26 · 12: 22 marksMay/Jun 26 · 11: 10 marksMay/Jun 26 · 12: 10 marksMay/Jun 26 · 13: 5 marks

What the papers say

  • Set in 23 of 25 Paper 1 sittings on the current syllabus — treat it as certain.
  • Worth about 12 marks a paper (16% of Paper 1).
  • Last set May/Jun 2026 · 0478/13 · Q7 for 5 marks — in the most recent series.
  • Set in each of the last 11 series without a miss.
  • Easing off: about 12.7 marks a paper earlier, 11.8 in the latest years — still examined, just smaller.
  • Lives on “Describe” and “Explain” — 62% of its questions: full sentences with a reason, not one-word answers.
  • Most of its marks (85%) come in extended questions of 6+ marks — plan the answer before writing.
  • Its biggest question so far: 18 marks (May/Jun 2024 · 0478/13 · Q7).
  • Inside the topic, §5.1 The internet and the world wide web carries the most marks (53%) and §5.2 Digital currency the least (1%).
  • It is examined mostly as AO1 (Knowledge & understanding, 71%), the rest AO2 (24%) — definitions and descriptions in syllabus words score.
  • The examiner has commented on 108 of its questions — read “What the examiner said” before you practise.

Command words

Share of questions using the word (a question can use several). What each wants →

Question shapes

  • 1–2 mk0
  • 3–4 mk14
  • 5–6 mk46
  • 7–9 mk20
  • 10+ mk50

Average 8.7 marks a question · 23% with a figure or table · 21% with code · biggest 18 marks

Assessment objectives — how it is examined

Every part of every current-syllabus question filed under Cambridge's AO1 / AO2 / AO3 (from its command word and what it asks you to do), so you know whether this topic pays for definitions, for applying, or for judging and building.

  • AO1 Knowledge & understanding
  • AO2 Apply to a context
  • AO3 Evaluate & judge

Paper 1 as a whole

Paper 1SyllabusMeasured
AO1 Knowledge & understanding60%64%
AO2 Apply to a context20%24%
AO3 Evaluate & judge20%12%

Syllabus = Cambridge's grid; measured = the bank's current-syllabus papers.

Inside the topic — every syllabus bullet, measured

Each part of each question is filed under the bullet it examines; the numbers are per Paper 1 sitting, exactly like the topic's. Open a bullet for its own Statometer.

  • 5.1The internet and the world wide web#5 of 20 on Paper 1Core · 7360% next paper5.4 marks16/25 sittings May/Jun 2026

    A regular earner inside the topic — most papers touch it.Syllabus: internet vs WWW; URLs; HTTP/HTTPS; web browser functions; locating and displaying a web page (DNS, IP, web server, HTML); session and persistent cookies

    Next Paper 1
    60%
    6 in 10
    Marks a paper
    5.4
    7% of the paper · 53% of the topic
    Asked in
    16 / 25
    Paper 1 sittings · 80 questions
    Last asked
    May/Jun 2026
    2210/11 · Q6 · 10 marks · 10-series streak
    • Asked in 16 of 25 Paper 1 sittings — about 6 papers in 10.
    • About 5.4 marks a paper (7% of Paper 1; 53% of the topic's marks across its 3 bullets).
    • Last asked May/Jun 2026 · 2210/11 · Q6 (10 marks) — in the most recent series.
    • Asked in each of the last 10 series.
    • Usually “Describe” or “Explain”: full sentences with a reason, not one-word answers.
    • Biggest chunk of marks so far: 14 in Oct/Nov 2024 · 2210/12 · Q7.
    • It is examined mostly as AO1 (Knowledge & understanding, 68%), the rest AO2 (27%) — definitions and descriptions in syllabus words score.
    Last 12 sittings Steady
    Oct/Nov 24 · 13: 13 marksFeb/Mar 25 · 12: 8 marksMay/Jun 25 · 11: 0 marksMay/Jun 25 · 12: 0 marksMay/Jun 25 · 13: 8 marksOct/Nov 25 · 11: 0 marksOct/Nov 25 · 12: 12.5 marksOct/Nov 25 · 13: 3 marksFeb/Mar 26 · 12: 10 marksMay/Jun 26 · 11: 10 marksMay/Jun 26 · 12: 0 marksMay/Jun 26 · 13: 0 marks

    Assessment objectives

    • AO1 Knowledge & understanding
    • AO2 Apply to a context
    • AO3 Evaluate & judge
    • Describe48%
    • Explain38%
    • Give38%
    • State34%
  • 5.2Digital currency#20 of 20 on Paper 1Occasional · 1118% next paper0.4 marks4/25 sittings May/Jun 2025

    Rotated in occasionally — the bullet students skip and then meet.Syllabus: what a digital currency is and how blockchain tracks its transactions

    Next Paper 1
    18%
    1 in 5 or less
    Marks a paper
    0.4
    1% of the paper · 1% of the topic
    Asked in
    4 / 25
    Paper 1 sittings · 4 questions
    Last asked
    May/Jun 2025
    2210/11 · Q9 · 2 marks · 3 series ago
    • Asked in only 4 of 25 Paper 1 sittings — rare, which is exactly why it catches candidates out.
    • About 0.4 marks a paper (1% of Paper 1; 1% of the topic's marks across its 3 bullets).
    • Last asked May/Jun 2025 · 2210/11 · Q9 (2 marks), 3 seriess ago.
    • Usually “Give”: short, precise answers in syllabus words.
    • Biggest chunk of marks so far: 4 in Oct/Nov 2024 · 0478/11 · Q8.
    • It is examined mostly as AO2 (Apply to a context, 62%), the rest AO1 (39%) — you must apply it to the scenario or the given data — a definition alone will not score.
    Last 12 sittings Steady
    Oct/Nov 24 · 13: 0 marksFeb/Mar 25 · 12: 0 marksMay/Jun 25 · 11: 2 marksMay/Jun 25 · 12: 0 marksMay/Jun 25 · 13: 0 marksOct/Nov 25 · 11: 0 marksOct/Nov 25 · 12: 0 marksOct/Nov 25 · 13: 0 marksFeb/Mar 26 · 12: 0 marksMay/Jun 26 · 11: 0 marksMay/Jun 26 · 12: 0 marksMay/Jun 26 · 13: 0 marks

    Assessment objectives

    • AO1 Knowledge & understanding
    • AO2 Apply to a context
    • AO3 Evaluate & judge
    • Give50%
    • Complete25%
    • Draw25%
    • Identify25%
  • 5.3Cyber security#6 of 20 on Paper 1Core · 7070% next paper4.8 marks18/25 sittings May/Jun 2026

    A regular earner inside the topic — most papers touch it.Syllabus: threats (brute-force, data interception, DDoS, hacking, malware, pharming, phishing, social engineering) and the solutions that keep data safe

    Next Paper 1
    70%
    7 in 10
    Marks a paper
    4.8
    6% of the paper · 46% of the topic
    Asked in
    18 / 25
    Paper 1 sittings · 84 questions
    Last asked
    May/Jun 2026
    0478/13 · Q7 · 5 marks · 4-series streak
    • Asked in 18 of 25 Paper 1 sittings — about 7 papers in 10.
    • About 4.8 marks a paper (6% of Paper 1; 46% of the topic's marks across its 3 bullets).
    • Last asked May/Jun 2026 · 0478/13 · Q7 (5 marks) — in the most recent series.
    • Asked in each of the last 4 series.
    • Easing: 5.1 → 4.9 marks a paper.
    • Usually “Describe” or “Explain”: full sentences with a reason, not one-word answers.
    • Biggest chunk of marks so far: 10 in May/Jun 2026 · 2210/12 · Q5.
    • It is examined almost entirely as AO1 (Knowledge & understanding, 77%) — definitions and descriptions in syllabus words score.
    Last 12 sittings Easing
    Oct/Nov 24 · 13: 3 marksFeb/Mar 25 · 12: 0 marksMay/Jun 25 · 11: 5 marksMay/Jun 25 · 12: 0 marksMay/Jun 25 · 13: 8 marksOct/Nov 25 · 11: 9 marksOct/Nov 25 · 12: 1.5 marksOct/Nov 25 · 13: 9 marksFeb/Mar 26 · 12: 6 marksMay/Jun 26 · 11: 0 marksMay/Jun 26 · 12: 10 marksMay/Jun 26 · 13: 5 marks

    Assessment objectives

    • AO1 Knowledge & understanding
    • AO2 Apply to a context
    • AO3 Evaluate & judge
    • Describe45%
    • Explain45%
    • Identify39%
    • Give38%

11% of the topic's marks sit in question parts that belong to another topic (scenario questions cross sections) or that no bullet claims; they count for the topic, not for a bullet.

Marks a paper, year by year

151617181920212223242526

Grey years are the previous syllabus (20152022, 95 questions) — history, not counted in the rates.

By exam series

  • Feb/Mar4/4 · 13.8 mk
  • May/Jun10/12 · 12.7 mk
  • Oct/Nov9/9 · 11.1 mk

What you need to know3syllabus §5.1, §5.2, §5.3

  1. 5.1The internet and the world wide webinternet vs WWW; URLs; HTTP/HTTPS; web browser functions; locating and displaying a web page (DNS, IP, web server, HTML); session and persistent cookies
  2. 5.2Digital currencywhat a digital currency is and how blockchain tracks its transactions
  3. 5.3Cyber securitythreats (brute-force, data interception, DDoS, hacking, malware, pharming, phishing, social engineering) and the solutions that keep data safe

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Infographics2draw these the way the examiner expects · download as PNG

URL anatomy & how a web page reaches youInternet = the physical network of networks. World Wide Web = the pages and services that run on it,fetched with HTTP(S).https://protocolwww.cswithzak.comdomain name (host)/learn/o-levelpath / file nameHTTPS = HTTP + SSL/TLS encryption(padlock: data encrypted in transit)Browseron your deviceDNS serverdomain name → IPWeb serverhosts the page1 “IP for this name?”2 “104.21.5.6”3 HTTP(S) GET request sent to that IP address4 HTML sent back → browser interprets it and renders the pageCookiesSession cookie: held in memory, deleted when the browser closes. Persistent cookie: saved to disk until it expires.Uses: keep you logged in, remember preferences/language, shopping basket, track browsing for adverts.Browser: renders HTML, runs JavaScript, keeps history, bookmarks and tabs, stores cookies.Blockchain: a chain of time-stamped blocks, each holding a hash of the previous block — tampering breaks the chain.A DNS server with no record asks a higher-level DNS server. Packets are routed to the IP address, never the name.cswithzak.com

URL anatomy & fetching a web page

O Level
Cyber security: threats vs defencesAim → describe the threat, its effect on the data or user, and the matching prevention. Always pair themup.ThreatWhat happensPrevent it withBrute-forcetrying every possible password until one workslong complex passwords, lock-out, 2FADDoSa botnet floods a server with requests until it failsfirewall, proxy server, traffic filteringHackingunauthorised access to a system to steal or change datafirewall, strong passwords, 2FA, encryptionMalwarevirus, worm, Trojan, spyware, adware, ransomwareanti-malware, updates, backupsPhishingfake email/text lures you to a fake site to enter detailscheck sender & URL, spam filter, awarenessPharmingmalicious code redirects a real URL to a fake websitecheck SSL certificate/padlock, anti-malwareSocial engineeringmanipulating people rather than systems (calls, pretexts)staff training, verify requests, policiesDefence toolkitaccess levelsanti-malwareauthenticationbiometricstwo-factor (2FA)firewallprivacy settingsproxy serverSSL / HTTPSauto-updatesbackupsEncryption makes intercepted data unreadable without the key. Firewall: filters traffic by rules. Proxy: also hides the real server.Virus: needs a host file · Worm: self-replicates across the network · Trojan: hides in legitimate-looking softwareSpyware: records keystrokes · Adware: unwanted adverts · Ransomware: encrypts your files until you paycswithzak.com

Cyber threats vs defences

O LevelAS

Browse all infographics →

Key terms14use these exact words in the exam

URLDNSHTTPScookieblockchainDDoSmalwarephishingpharmingfirewallproxy serverSSLbiometricstwo-factor authentication

Dotted terms are defined in the glossary.

Code help2referenced to the Cambridge pseudocode guide

Password strength check (validation + security)

pseudocode Run in Playground
DECLARE P : STRING
DECLARE i, Digits : INTEGER
DECLARE Ch : CHAR
P "Zak2026!"
Digits 0
FOR i 1 TO LENGTH(P)
Ch SUBSTRING(P, i, 1)
IF Ch >= '0' AND Ch <= '9' THEN
Digits Digits + 1
ENDIF
NEXT i
IF LENGTH(P) >= 8 AND Digits >= 1 THEN
OUTPUT "Strong enough"
ELSE
OUTPUT "Too weak"
ENDIF

Caesar-shift encryption (symmetric key idea)

pseudocode Run in Playground
DECLARE Msg, Out : STRING
DECLARE i, Key, Code : INTEGER
Msg "HELLO"
Key 3
Out ""
FOR i 1 TO LENGTH(Msg)
Code ASC(SUBSTRING(Msg, i, 1)) - 65
Out Out & CHR((Code + Key) MOD 26 + 65)
NEXT i
OUTPUT Out

💡 Same key decrypts by shifting back — that is what 'symmetric' means.

Playground examples1runnable program for this topic

  • Caesar cipher — encrypt & decrypt

    Shift letters with ASC and CHR, wrapping with MOD 26. Same key both ways = symmetric encryption.

    O LevelASA2PseudocodeString handling §5.5 · 2210 §5 / 9618 §6.2 security
    Run

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