7:00AM Adam Pash | Web site Linux.com offers a few tips for taking advantage of the second Ethernet port on the back of your computer. For example, in Linux you can bond your two ports for load balancing and fault tolerance.
…bonding [combines] both of the computer’s interfaces into a single interface…. The OS can alternate which interface it uses to send traffic, or it can gracefully fail over between them in the event of a problem. You can even use it to balance your traffic between multiple wide area network (WAN) connections, such as DSL and cable, or dialup and your next door neighbor’s unsecured Wi-Fi.
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