A Linux administration is using a Linux system as a router. During the tests, the administrator discovers that IP packets are not being sent between the configured interfaces.
Which of the following commands enables this feature for IPv4 networks?
A. cat /proc/sys/net/ipv4/ip_route > 1
B. echo "1" > /proc/sys/net/ipv4/ip_forward
C. echo "1" > /proc/sys/net/ipv4/ip_route
D. echo "1" > /proc/sys/net/ipv4/ip_net
