It is important to have a familiarity with the OSI 7 layer stack model when
considering what type of traffic or devices can be load balanced. This
knowledge is important because load balancing of traffic and, for that
matter, devices is normally performed at Layer 2 (Data), Layer 4 (Transport)
and Layer 7 (Application). It is also important to consider what information
you require from your load balancers. For example, a business may need a
health check on the performance of servers and applications, and/or
information about server loading levels together with the ability to use load
balancers to optimize the bandwidth that is available.
If you use an ADSL router at home you may discover that you are already
experiencing the benefits of load balancing (multiplexing) without even
knowing it. The better ADSL routers load balance according to the
applications that are... (more)