Agreed. The correct answer is D and E.
Why?
☞ A simple entering of the commands allowed me to discern which were the correct answers. The commands on A,B,C are invalid when entered in a bash prompt running on Ubuntu 20.04.
D and E are the correct, other commands do not work:
$ ifconfig enp0s3
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.2.15 netmask 255.255.255.0 broadcast 10.0.2.255
inet6 fe80::67a:5b4c:48bd:1f76 prefixlen 64 scopeid 0x20<link>
ether 08:00:27:d7:92:97 txqueuelen 1000 (Ethernet)
RX packets 119434 bytes 94919173 (90.5 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 71324 bytes 13441351 (12.8 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
$ ip -s link show enp0s3
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
link/ether 08:00:27:d7:92:97 brd ff:ff:ff:ff:ff:ff
RX: bytes packets errors dropped overrun mcast
94919173 119434 0 0 0 5430
TX: bytes packets errors dropped carrier collsns
13441351 71324 0 0 0 0
$
upvoted 4 times
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