— Vinamra Jain (CSBS 2022-26)

CCNA 1: Introduction to Networks Notes

Module 1: Networking Today

Networks and Their Impact

Networks connect people globally, enabling instant communication, collaboration, and access to cloud storage and services anytime, anywhere.

Network Components

• Hosts (End Devices): Send and receive data.
• Intermediary Devices: Route and manage traffic.
• Media: The physical or wireless means through which data travels.

Network Topologies

• Physical Topology: Shows device locations and cabling.
• Logical Topology: Shows data flow, ports, and addressing.

Types of Networks

• LANs: Cover small areas (e.g., homes, offices).
• WANs: Cover wide areas (e.g., the internet).
• Intranet/Extranet: Private networks for internal use or shared access.

Internet Connections

• SOHO Connections: Cable, DSL, satellite, etc.
• Business Connections: Leased lines, Metro Ethernet, etc.