Two internet connections combined into one.
Two internet connections combined into one.
Even if they're asking that way, I don't think a single stream is necessary for speed. For instance, game downloads use multiple threads and can handle heavy traffic by balancing connections on two or more links. With three internet links, performance drops because perfectly matching all three with a simple round-robin system becomes less likely, though it still often functions. Right now I'm downloading 180Mbit (up to 220Mbit sometimes) through Epic Launcher using 2x61Mbit DSL and one LTE connection. Steam, Ubisoft Connect, Playstation and Xbox also work well. The downside is that online gaming can randomly switch between connections, which isn't great when you're on LTE.
We currently use a basic home internet setup. We were considering installing a lease line, but we’re staying at our present office location for another year or so before being moved. To avoid spending a lot right away, we’re looking into adding a second broadband connection and connecting it with a router that has two WAN ports.
It all comes down to your needs. Bonding is only useful when you want higher combined upload speeds and faster single-threaded downloads. For simply improving smooth browsing across several users, load balancing is sufficient—each user’s page loads from both WANs, which may not be perfectly even, but usually handles itself, especially with many users online at once. The same applies to uploads; traffic spreads randomly across WANs, keeping speeds consistent even during heavy upload activity.