I am being asked to spec a system for a private residence that needs redundant network connections. They will have cable internet as a primary connection and are not sure what to use as a backup.
I am looking for help with:
1. What kind of backup connections are most often used in situations like this. I assume it would be of a different media type, like DSL, satellite, or some other kind of wireless based option.
2. We need to spec Cisco equipment. What router (preferably an ISR not an ASA) would be the best option for this? I imagine an 1800 series router with two interface cards one for each connection would do. Thoughts?