Computer Networks

☰ 1 Introduction to Networking

☰ 1.1 What is a Computer Network?
☰ 1.2 Why Networks Matter
☰ 1.3 Types of Networks
- ☰ 1.3.1 PAN
- ☰ 1.3.2 LAN
- ☰ 1.3.3 MAN
- ☰ 1.3.4 WAN
☰ 1.4 Network Topologies
- ☰ 1.4.1 Bus
- ☰ 1.4.2 Star
- ☰ 1.4.3 Ring
- ☰ 1.4.4 Mesh
☰ 1.5 Network Components
- ☰ 1.5.1 Hosts
- ☰ 1.5.2 Clients / Servers
- ☰ 1.5.3 NICs
- ☰ 1.5.4 Switches
- ☰ 1.5.5 Routers
- ☰ 1.5.6 Modems
☰ 1.6 Bandwidth, Latency, Throughput

☰ 2 Binary and Networking Fundamentals

☰ 2.1 Binary Numbers
☰ 2.2 Bits vs Bytes
☰ 2.3 Decimal ↔ Binary Conversion
☰ 2.4 Hexadecimal Basics
☰ 2.5 Data Units (Kbps, Mbps, Gbps)
☰ 2.6 Encapsulation

☰ 3 OSI Model

☰ 3.1 Why Layering?
☰ 3.2 Overview of 7 Layers
☰ 3.3 Physical Layer
☰ 3.4 Data Link Layer
☰ 3.5 Network Layer
☰ 3.6 Transport Layer
☰ 3.7 Session Layer
☰ 3.8 Presentation Layer
☰ 3.9 Application Layer
☰ 3.10 Encapsulation & Decapsulation
☰ 3.11 Packet Journey

☰ 4 TCP/IP Model

☰ 4.1 TCP/IP vs OSI
☰ 4.2 Internet Layer
☰ 4.3 Transport Layer
- ☰ 4.3.1 Ports & Sockets
- ☰ 4.3.2 TCP Overview
- ☰ 4.3.3 Three-Way Handshake
- ☰ 4.3.4 Reliable Transmission
- ☰ 4.3.5 Flow Control
- ☰ 4.3.6 Congestion Control
- ☰ 4.3.7 UDP
- ☰ 4.3.8 TCP vs UDP
☰ 4.4 Application Layer
☰ 4.5 Packet Flow

☰ 5 Physical Layer & Transmission Media

☰ 5.1 Electrical Signals
☰ 5.2 Copper Cables
- ☰ 5.2.1 Twisted Pair
- ☰ 5.2.2 Coaxial
☰ 5.3 Fiber Optics
☰ 5.4 Wireless Transmission
☰ 5.5 Duplex Modes
☰ 5.6 Signal Loss
☰ 5.7 Error Detection

☰ 6 Ethernet and Switching

☰ 6.1 Ethernet Basics
☰ 6.2 MAC Addresses
☰ 6.3 Ethernet Frames
☰ 6.4 Collision Domains
☰ 6.5 Broadcast Domains
☰ 6.6 Hubs vs Switches
☰ 6.7 MAC Learning
☰ 6.8 VLANs
☰ 6.9 Trunking (802.1Q)
☰ 6.10 Spanning Tree Protocol

☰ 7 IP Addressing

☰ 7.1 IPv4 Fundamentals
☰ 7.2 Public vs Private IP
☰ 7.3 Classful Addressing
☰ 7.4 Subnet Masks
☰ 7.5 CIDR
☰ 7.6 Subnetting
☰ 7.7 VLSM
☰ 7.8 Supernetting
☰ 7.9 IP Planning

☰ 8 IPv6

☰ 8.1 Why IPv6?
☰ 8.2 IPv6 Address Format
☰ 8.3 Address Types
☰ 8.4 IPv6 Header
☰ 8.5 SLAAC
☰ 8.6 Neighbor Discovery
☰ 8.7 IPv4 vs IPv6

☰ 9 Routing Fundamentals

☰ 9.1 What is Routing?
☰ 9.2 Static Routing
☰ 9.3 Dynamic Routing
☰ 9.4 Routing Tables
☰ 9.5 Administrative Distance
☰ 9.6 Metrics
☰ 9.7 Default Routes
☰ 9.8 Route Summarization

☰ 10 Routing Protocols

☰ 10.1 Distance Vector Routing
☰ 10.2 Link State Routing
☰ 10.3 RIP
☰ 10.4 OSPF
☰ 10.5 EIGRP
☰ 10.6 BGP
☰ 10.7 Path Selection
☰ 10.8 Convergence

☰ 11 ARP, ICMP, and Core Protocols

☰ 11.1 ARP
☰ 11.2 Gratuitous ARP
☰ 11.3 ICMP
☰ 11.4 Ping
☰ 11.5 Traceroute
☰ 11.6 MTU & Fragmentation

☰ 12 DNS and Name Resolution

☰ 12.1 Why DNS?
☰ 12.2 Domain Hierarchy
☰ 12.3 Recursive Queries
☰ 12.4 DNS Record Types
- ☰ 12.4.1 A
- ☰ 12.4.2 AAAA
- ☰ 12.4.3 CNAME
- ☰ 12.4.4 MX
- ☰ 12.4.5 TXT
☰ 12.5 DNS Caching
☰ 12.6 DNS Security

☰ 13 Application Layer Protocols

☰ 13.1 HTTP / HTTPS
☰ 13.2 FTP / SFTP
☰ 13.3 SMTP
☰ 13.4 POP3
☰ 13.5 IMAP
☰ 13.6 SSH
☰ 13.7 Telnet
☰ 13.8 DHCP
☰ 13.9 SNMP
☰ 13.10 NTP

☰ 14 Wireless Networking

☰ 14.1 Radio Fundamentals
☰ 14.2 Wi-Fi Standards
☰ 14.3 Frequency Bands
☰ 14.4 Channels
☰ 14.5 Roaming
☰ 14.6 Interference
☰ 14.7 WPA2 / WPA3
☰ 14.8 Enterprise Wi-Fi

☰ 15 NAT and Internet Connectivity

☰ 15.1 NAT Basics
☰ 15.2 PAT
☰ 15.3 Port Forwarding
☰ 15.4 ISP Concepts
☰ 15.5 CGNAT
☰ 15.6 Internet Routing

☰ 16 Network Security Fundamentals

☰ 16.1 CIA Triad
☰ 16.2 Firewalls
☰ 16.3 ACLs
☰ 16.4 VPN
☰ 16.5 IDS / IPS
☰ 16.6 Zero Trust
☰ 16.7 DDoS
☰ 16.8 Malware in Networks
☰ 16.9 Security Hardening

☰ 17 Network Services

☰ 17.1 Load Balancing
☰ 17.2 Reverse Proxy
☰ 17.3 Web Hosting
☰ 17.4 CDN
☰ 17.5 DNS Hosting

☰ 18 Monitoring and Troubleshooting

☰ 18.1 Troubleshooting Methodology
☰ 18.2 Layer-by-Layer Debugging
☰ 18.3 Ping / Traceroute
☰ 18.4 Netstat
☰ 18.5 Tcpdump
☰ 18.6 Wireshark
☰ 18.7 Logs
☰ 18.8 Packet Analysis

☰ 19 Virtualization and Cloud Networking

☰ 19.1 Virtual Switches
☰ 19.2 Hypervisors
☰ 19.3 SDN
☰ 19.4 Overlay Networks
☰ 19.5 Containers & Networking
☰ 19.6 Kubernetes Networking
☰ 19.7 Cloud VPCs

☰ 20 Advanced Enterprise Networking

☰ 20.1 MPLS
☰ 20.2 VXLAN
☰ 20.3 EVPN
☰ 20.4 SD-WAN
☰ 20.5 QoS
☰ 20.6 Traffic Engineering

☰ 21 Automation & Infrastructure as Code

☰ 21.1 Why Automation?
☰ 21.2 APIs
☰ 21.3 REST
☰ 21.4 Python for Networking
☰ 21.5 Netmiko
☰ 21.6 Ansible
☰ 21.7 Terraform
☰ 21.8 Configuration Management

☰ 22 Network Design

☰ 22.1 Small Office Design
☰ 22.2 Enterprise Design
☰ 22.3 Data Center Networks
☰ 22.4 Redundancy
☰ 22.5 High Availability
☰ 22.6 Capacity Planning

☰ 23 Specialized Topics

☰ 23.1 IoT Networking
☰ 23.2 Industrial Networks
☰ 23.3 5G Basics
☰ 23.4 Satellite Networks
☰ 23.5 HPC Networking (InfiniBand, RDMA)
☰ 23.6 Edge Computing

☰ 24 Capstone Projects

☰ 24.1 Home Lab Project
☰ 24.2 Enterprise Network Design
☰ 24.3 Secure Multi-Site Network
☰ 24.4 Packet Analysis Project
☰ 24.5 Cloud Networking Project

☰ 25 Bonus Content

☰ 25.1 Certification Prep (CCNA / CCNP)
☰ 25.2 Interview Questions
☰ 25.3 Hands-on Labs
☰ 25.4 Real-World Case Studies
☰ 25.5 Final Exam

Computer Networks

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