Note
This repository contains my personal CCNA study notes while preparing for the Cisco Certified Network Associate (CCNA). The notes are written for my own understanding.
This repository previously contained Packet Tracer labs, networking projects, and other practical exercises. Those materials have been archived and are no longer available in this repository.
The repository has since been repurposed into a dedicated base focused on networking concepts, protocol internals, Cisco IOS, and structured CCNA notes.
Important
These notes are intended as a revision and reference guide rather than a complete CCNA course.
If you're learning CCNA for the first time, I highly recommend watching Jeremy's IT Lab CCNA Course before using these notes. After completing each lesson, you can return here to review the concepts, commands, diagrams, and references.
Jeremy's IT Lab – Free CCNA Course
https://youtube.com/playlist?list=PLxbwE86jKRgMpuZuLBivzlM8s2Dk5lXBQ&si=SGxt5Ij815bdxih9
| Topics | Link |
|---|---|
| IPv6 SLAAC, Router Solicitation (RS), Router Advertisement (RA), Duplicate Address Detection (DAD) | Open |
| Spanning Tree Protocol (STP), Root Bridge Election, Port Roles, BPDUs, Convergence | Open |
| PortFast, UplinkFast, BackboneFast, STP Convergence Improvements | Open |
| IPv4 Multicast, IPv6 Multicast, OSPF, RIP, EIGRP, Link-Local Multicast Groups | Open |
DHCP, DORA Process, DHCP Relay, ip helper-address |
Open |
DNS Caching, Time To Live (TTL), DNS Cache, ipconfig /displaydns, ipconfig /flushdns |
Open |
| Domain Name System (DNS), DNS Records, UDP/TCP Port 53, Cisco DNS Client & Server | Open |
| Simple Network Management Protocol (SNMP), GET, SET, TRAP, INFORM, SNMPv1/v2c/v3 | Open |
Cisco Password Security, enable secret, enable password, service password-encryption |
Open |
Cisco IOS show Commands, CLI Pipes, include, exclude, section, begin |
Open |
| Quality of Service (QoS) & Packet Processing Pipeline | Open |
| Security Fundamentals (CIA Triad, AAA & Common Network Attacks) | Open |
Port Security, Violation Modes, Aging Timers, MAC spoofing |
Open |
DHCP Snooping, Binding database, DHCP starvation attacks, Sticky MAC learning |
Open |
Dynamic ARP Inspection (DAI), ARP Poisoning, ARP Spoofing, Man-in-the-Middle (MitM) |
Open |
Enterprise Network Architectures, Campus, Data Center Spine-Leaf, SOHO (Small Office/Home Office). |
Open |
WAN Architectures, private WAN services, public Internet, site-site VPN.,Remote access VPN |
Open |
Virtualization & Cloud Computing, Hypervisor Types, 5 Essential Characteristics, 3 Service Models.,4 Deployment Models. |
Open |
Virtual Machines (VMs) vs Containers, VM vs Container Architecture, Containers, Docker vs Kubernetes |
Open |
| VRF-Lite-Virtual Routing and Forwarding | Open |
Wireless LAN Fundamentals, RF wave behaviors, frequency vs. amplitude, 2.4 GHz vs. 5 GHz bands,non-overlapping channels (1, 6, 11), Wireless Service Sets (IBSS, BSS, ESS, MBSS) |
Open |
Wireless LAN Architecture, 802.11 Frames, WLC, CAPWAP & Client Association,802.11 Message Type, WLC Deployment, AP'S Deployment |
Open |
Wireless Security, Authentication, , Encryption,, Integrity, WPA Standards |
Open |
Tip
I try to include references to official Cisco documentation, RFCs, IEEE standards and other authoritative resources whenever they are relevant to a topic.