In networking, a backup link is a backup connection to a remote network or system.
A backup link can be a second physical connection, such as a second network cable, or a virtual connection, such as a Virtual Private Network (VPN) tunnel.
When a backup link is available, the primary link is used for normal traffic, and the backup link is used only if the primary link fails.
A backup link can be used to provide redundancy, or failover, in …
