Firewall rules and packet Filtering - Cambridge IGCSE & A-Level 9618 | AQA|OCR|GCSE Computer Science - Cambridge IGCSE, AS/ A Level | PPT + Worksheets + Activity + MCQ Quiz + Answer Marking Scheme.

Also suitable for AQA GCSE Computer Science, OCR GCSE Computer Science, Edexcel Computer Science and A-Level Computer Science teachers.

Bundle Contents

LECTURE.pptx
30 slides — 6 sections covering firewall types, DMZ architecture, packet filter fields, port reference table, rule anatomy with colour-coded ALLOW/DENY tables, stateless vs stateful comparison, worked exam traces (slides 13–14, 26–27), practice questions, and summary

Worksheet.docx
56-mark structured worksheet — port completion table, DORA-style rule tracing (6 packets), CIDR questions, write-your-own rules for a hospital network, DMZ evaluation, limitation analysis

Activity.docx
3-part classroom pack — Rule Auction (spot dangerous/wrong rules), Packet Race (12-packet timed challenge vs a rule table), SecureBank Design Challenge (write outer + inner firewall rules for a realistic scenario)

Answers_MarkingScheme.docx
Full mark scheme — point-by-point worksheet answers, model rule tables for all writing questions, MCQ key with explanations, activity solutions including SecureBank outer/inner firewall model answers, grade boundaries

All worksheets are print-ready

Fully editable resources.

Great for: classroom teaching, revision lessons, flipped learning, homework tasks.

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