CompTIA Linux+ (XK0-004) — Question 152

A Linux administrator 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?

Answer options

• A. cat /proc/sys/net/ipv4/ip_route > 1
• B. echo ג€1ג€ > /proc/sys/net/ipv4/ip_forward
• C. echo ג€1ג€ > /proc/sys/net/ipv4/ip_route
• D. echo ג€1ג€ > /proc/sys/net/ipv4/ip_net

Correct answer: B

Explanation

The correct answer is B, as the command 'echo 1 > /proc/sys/net/ipv4/ip_forward' specifically enables IP forwarding, allowing packets to be routed between interfaces. Options A, C, and D do not relate to enabling IP forwarding; instead, they attempt to modify settings that do not control packet forwarding behavior.