To connect and communicate to an Ethernet device like an Acromag Ethernet module, you have three potential connection scenarios:

  1. Direct connect your Ethernet device to your computer – Easiest but the most restrictive, as it dominates the use of your Ethernet port and may temporarily take your computer off-line from the internet.
  2. Network connect your Ethernet device to your LAN (Local Area Network) – A little more complicated and does not include remote access from another network.
  3. Remotely connect to your Ethernet device over the internet – This requires the second scenario, but adds Port Forwarding, requires a static public IP address, and potentially adds the services of a VPN (Virtual Private Network).

This paper gives detailed information and examples on how to make these connections.

Topics Discussed:

  • What is Ethernet?
  • The Internet Protocol (IP) and Ethernet Addressing
  • The Transmission Control Protocol (TCP)
  • The User-Datagram Protocol (UDP)
  • The MAChine Address
  • Three Different Types of Connection to an Ethernet Device