Learn how networks work, set up LAN/Wi-Fi, troubleshoot connectivity issues, and ensure network security basics.

Introduction to Networking

1. How Networks Work

• A network is a group of devices (computers, phones, printers) that can communicate with each other.

• Devices talk using IP addresses and follow rules called protocols (like TCP/IP).

• Networks can be wired (Ethernet cables) or wireless (Wi-Fi).

2. Setting Up a LAN/Wi-Fi

• LAN (Local Area Network) connects devices in one location, like your home or office.

• Wi-Fi allows devices to connect without cables.

• To set up:

  1. Connect a router to your internet.

  2. Connect devices via Ethernet cables or Wi-Fi password.

  3. Assign IP addresses automatically (DHCP) or manually.

3. Troubleshooting Connectivity Issues

• Common problems: slow internet, no connection, or device not visible.

• Basic steps:

  1. Check cables and Wi-Fi signal.

  2. Restart router or device.

  3. Use ping to check connectivity.

  4. Check IP settings and firewall rules.

4. Basic Network Security

• Protect your network to keep data safe:

  • Use strong Wi-Fi passwords.

  • Enable encryption (WPA3 is best).

  • Keep your router and devices updated.

  • Limit guest access and monitor connected devices.