Originally Posted by Jeff78
You'll need some third-party software to load balance the connections. Remember that you will never get more speed than the highest connection available. Combining a 3mbps and a 1.5mbps will get you 3mbps balanced across two connections, not 4.5mbps. It may
improve your latency but it will not increase your max speeds.
^^^^ This is 100% correct, partly. =)
If you're attempting to increase the speed of a single TCP/IP connection, say a FTP download from Microsoft to your PC, then no - you can't increase the speed beyond what a single link will provide. That's because when the TCP/IP connection is established, the source and destination MAC addresses are used to route the signal between your computer and the remote computer. Unfortunately in this situation, the MAC address resolves to only ONE of your network interfaces - either the 4G, OR the Comcast link - not both.
IF, however, you're attempting to increase the speed of something like a Torrent or a peer-to-peer download of something like World of Warcraft, through the Blizzard P2P downloader, then yes - it will give you faster speeds. That's because in this case, you're opening many TCP/IP connections to multiple hosts elsewhere on the Internet simultaneously. Some connections will go over the 4G, some will go over the Comcast link, but none of them will go over "both" at the same time.