Certificate in Mobile App Development · Module 2: Networking Fundamentals, The OSI Model

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Course content

Module 1: Introduction to Cybersecurity 4

Module 2: Networking Fundamentals 4

Module 3: Cyber Threats and Attacks 4

Module 4: Security Controls and Defense 4

Module 5: Web Application Security 4

Module 6: Ethical Hacking Basics 4

Module 7: Incident Response and Forensics 4

Module 8: Security Operations (SOC) 4

Module 9: Governance, Risk, and Compliance 4

Module 10: Capstone Project 3

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Module 2: Networking Fundamentals

The OSI Model

Certificate in Mobile App Development

35 min

The OSI Model Explained

The Open Systems Interconnection (OSI) model is a conceptual framework that standardizes network communication into seven layers.

Layer	Name	Function
7	Application	HTTP, FTP, SMTP - User interfaces
6	Presentation	Data formatting, encryption
5	Session	Session management
4	Transport	TCP, UDP - Reliable delivery
3	Network	IP, routing - Logical addressing
2	Data Link	MAC addresses, switches
1	Physical	Cables, signals, hardware

Understanding the OSI model helps security professionals identify where attacks occur and implement security controls at appropriate layers.

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