Crucial Exams

CompTIA Linux+ XK0-006 (V8) Practice Question

While investigating why a Linux web server suddenly went offline, you run the following commands:

$ ip link show enp0s25
2: enp0s25: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
link/ether 00:1a:4a:11:22:33 brd ff:ff:ff:ff:ff:ff

$ sudo ethtool enp0s25 | grep 'Link detected'
Link detected: no

The interface was not administratively shut down, and its IPv4 settings were unchanged.

Which of the following is the most likely cause of the link-down condition?

  • A firewall rule is dropping outbound traffic on the interface.

  • The interface has an incorrect IP address for its subnet.

  • The Ethernet cable is unplugged or the connected switch port is disabled.

  • The interface MTU is set higher than the switch supports.

CompTIA Linux+ XK0-006 (V8)
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