Networking Fundamentals Course

Lesson 1 • Types of Networks by Scale

Distinguishes LAN, WAN, MAN, and PAN by geographic scope and typical use. Connects scale to design decisions made throughout the course.

Lesson 2 • Basic Data Communication Concepts

Explains how data travels as signals, bits, and frames across a medium. Grounds students in transmission fundamentals before protocol study.

Lesson 3 • What Is a Computer Network

Defines networks, their purpose, and real-world applications. Establishes the conceptual baseline for all subsequent networking topics.

Lesson 4 • Network Standards and Organisations

Identifies key standards bodies and why interoperability standards matter. Sets context for protocol specifications covered in later chapters.

Lesson 1 • The Seven OSI Layers

Details each OSI layer's function, data unit, and representative protocols. Provides the reference framework used throughout the entire course.

Lesson 2 • The TCP/IP Model in Practice

Maps TCP/IP's four layers to OSI equivalents and explains its dominance in modern networks. Bridges theory to the protocols students will configure.

Lesson 3 • Devices Mapped to OSI Layers

Associates hubs, switches, routers, and firewalls with their operating layers. Prepares students for hardware selection in network design chapters.

Lesson 4 • Purpose of Layered Network Models

Explains why abstraction layers simplify design, troubleshooting, and vendor interoperability. Motivates the OSI and TCP/IP model study that follows.

Lesson 1 • IPv4 Address Structure

Breaks down the 32-bit IPv4 address into octets, classes, and public vs. private ranges. Establishes the addressing foundation for subnetting.

Lesson 2 • Subnetting Techniques and Practice

Applies binary and shortcut methods to divide address space into subnets. Builds the calculation speed needed for design and exam scenarios.

Lesson 3 • Subnet Masks and CIDR Notation

Explains how subnet masks divide network and host portions and introduces CIDR slash notation. Enables students to read and write address prefixes accurately.

Lesson 4 • Address Assignment Methods

Covers static assignment, DHCP, and IPv6 SLAAC for distributing addresses to hosts. Connects addressing theory to practical network administration tasks.

Lesson 1 • VLANs and Network Segmentation

Introduces VLANs as logical segments that improve security and reduce broadcast domains. Prepares students for inter-VLAN routing covered in the next chapter.

Lesson 2 • Ethernet Standards and Frame Structure

Examines Ethernet evolution from 10 Mbps to 100 Gbps and dissects the frame format. Grounds students in the Layer 2 technology used in virtually every LAN.

Lesson 3 • How Switches Learn and Forward

Details MAC address table building, flooding, forwarding, and filtering decisions. Explains the intelligence that makes switches superior to hubs.

Lesson 4 • Spanning Tree Protocol

Explains how STP prevents Layer 2 loops in redundant switch topologies. Covers port states, root bridge election, and rapid STP improvements.

Lesson 1 • Inter-VLAN Routing and Layer 3 Switching

Demonstrates router-on-a-stick and Layer 3 switch SVIs for routing between VLANs. Connects switching knowledge from the previous chapter to routing practice.

Lesson 2 • Dynamic Routing Protocol Concepts

Compares distance-vector, link-state, and path-vector protocol categories by algorithm and convergence behaviour. Frames the selection criteria used in enterprise design.

Lesson 3 • How Routers Make Forwarding Decisions

Explains routing table lookup, longest-prefix match, and administrative distance. Establishes the decision logic underlying all routing protocol discussions.

Lesson 4 • Interior Gateway Protocols

Examines OSPF and EIGRP operation, neighbour relationships, and metric calculation. Equips students to deploy and verify common enterprise routing protocols.

Lesson 1 • UDP and Connectionless Communication

Contrasts UDP's low-overhead, best-effort delivery with TCP's reliability guarantees. Identifies applications where speed outweighs the need for guaranteed delivery.

Lesson 2 • TCP Reliability and Flow Control

Explains sequence numbers, acknowledgments, retransmission, and sliding window flow control. Shows how TCP guarantees delivery without application-layer intervention.

Lesson 3 • Port Numbers and Socket Pairs

Explains well-known, registered, and ephemeral port ranges and how socket pairs identify sessions. Enables students to read port information in packet captures.

Lesson 4 • Network Address Translation

Covers static NAT, dynamic NAT, and PAT operation and their impact on transport-layer sessions. Connects address conservation to real-world enterprise and home networks.

Lesson 1 • Access Control Lists

Teaches standard and extended ACL syntax, placement rules, and traffic filtering logic. Enables students to write and verify ACLs on routers and Layer 3 switches.

Lesson 2 • Wireless Security Protocols

Compares WEP, WPA, WPA2, and WPA3 security mechanisms and their known vulnerabilities. Guides students toward selecting appropriate wireless security for modern deployments.

Lesson 3 • Firewalls and Packet Filtering

Compares stateless packet filtering, stateful inspection, and next-generation firewall capabilities. Prepares students to design and evaluate perimeter security architectures.

Lesson 4 • Common Network Threats and Attack Types

Surveys reconnaissance, DoS, man-in-the-middle, and spoofing attacks with real examples. Motivates the security controls introduced throughout the chapter.

Lesson 1 • Packet Capture and Analysis

Teaches capture filter syntax, protocol dissection, and flow analysis using a packet analyser. Enables students to inspect actual traffic to confirm or refute hypotheses.

Lesson 2 • Troubleshooting Common Network Issues

Applies the methodology to IP addressing errors, routing failures, VLAN mismatches, and connectivity drops. Synthesises all prior course knowledge into realistic fault scenarios.

Lesson 3 • Troubleshooting Methodologies

Introduces top-down, bottom-up, divide-and-conquer, and follow-the-path approaches. Provides a repeatable framework students apply to every lab and real-world scenario.

Lesson 4 • Essential Diagnostic Command-Line Tools

Demonstrates ping, traceroute, nslookup, netstat, and arp for rapid fault isolation. Builds the command fluency required in every professional networking role.