A Linux administrator has configured a Linux system to be used as a router. The administrator confirms that two network adapters are properly installed and functioning correctly. In addition, the output of the iptables -L command appears to contain a complete firewall configuration. Which of the following commands does the administrator need to issue for the router to be fully functional?
A) echo "1" /proc/sys/net/ipv4/ip_forward
B) echo "0" /proc/sys/net/ipv4/tcp_abort_on_overflow
C) echo "0" /proc/sys/net/ipv4/max_connections
D) echo "1" /proc/sys/net/ipv4/ip_default_ttl

Question

A Linux administrator has configured a Linux system to be used as a router. The administrator confirms that two network adapters are properly installed and functioning correctly. In addition, the output of the iptables -L command appears to contain a complete firewall configuration. Which of the following commands does the administrator need to issue for the router to be fully functional?
A) echo "1" > /proc/sys/net/ipv4/ip_forward
B) echo "0" > /proc/sys/net/ipv4/tcp_abort_on_overflow
C) echo "0" > /proc/sys/net/ipv4/max_connections
D) echo "1" > /proc/sys/net/ipv4/ip_default_ttl

Quizplus · Accepted Answer

The command "echo '1' > /proc/sys/net/ipv4/ip_forward" enables IP forwarding, which is necessary for a Linux system to function as a router by allowing it to forward packets between network interfaces.

A Linux Administrator Has Configured a Linux System to Be