Crucial Exams

CompTIA Linux+ XK0-006 (V8) Practice Question

A Linux web server on the 172.16.20.0/24 LAN suddenly loses the ability to reach any external network, although hosts on the same subnet remain reachable. The following routing table is displayed:

$ ip route show
default via 192.168.1.1 dev eth0 metric 10
default via 172.16.20.1 dev eth0 proto dhcp metric 100
172.16.20.0/24 dev eth0 proto kernel scope link src 172.16.20.55

The address 192.168.1.1 is not present on the current physical network. Which ONE command will immediately restore external connectivity while leaving the DHCP-supplied route in place?

  • iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

  • ip route del default via 192.168.1.1

  • ip link set eth0 mtu 1400

  • echo 1 > /proc/sys/net/ipv4/ip_forward

CompTIA Linux+ XK0-006 (V8)
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