What Is a Tunnel?

Let's dig into tunnels. While some network engineers may want to quibble, a tunnel is when you put one packet inside of another packet to carry it across a network (frames also come into the picture, so hold off on your follow-ups for now). On today's N Is For Networking, Ethan and Holly explore this working definition of a tunnel, talk about security and traffic engineering use cases for tunnels, and touch on different tunneling protocols. This week's bonus material is a discussion about how overlays and underlays relate to tunnels. N Is For Networking is part of the Packet Pushers network. Visit our website to find more great networking and technology podcasts, along with tutorial videos, the Human Infrastructure newsletter, and loads more resources for building your IT career. https://packetpushers.net