When Internet connectivity is critical, two separate Internet Service Providers (ISPs) may be used. The second ISP may be used as a hot backup that will automatically switch on if the primary Internet connection goes down. The Cisco Linksys RV042 Load Balancing 2 port WAN 4 port LAN VPN Router is one of the devices used for switching ISP connections.
Cisco Linksys RV042 Load Balancing 2 port WAN 4 port LAN VPN Router specifications
DMZ port
Routing
Firewall protection
Manageable
VPN support
DHCP support
Load balancing
NAT support
DoS attack prevention
Full duplex capability
Switching Dynamic DNS server
Stateful Packet Inspection (SPI)