How can the existing environment variable FOOBAR be suppressed for the execution of the script./myscript only?

• A.set -a FOOBAR="";./myscript
• B.unset -v FOOBAR;./myscript
• C.env -u FOOBAR./myscript
• D.env -i FOOBAR./myscript

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Which of the following lines are valid in the file /etc/hosts? (Choose TWO correct answers.)

• A.www.example.com,www 203.0.13.15,2001:db8::15
• B.2003.0.113.15,2001:db8::15 www.example.com www
• C.203.0.113.15 www.example.com www
• D.www.example.com www 203.0.13.15
• E.2001:db8::15 www.example.com www

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Which of the following tools used for DNS debugging, reports not only the response from the name server but also details about the query?

• A.dig
• B.dnslookup
• C.dnsq
• D.hostname
• E.zoneinfo

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FILL BLANK
Which environment variable is used by an X11 client to determine the X Server to connect to? (Specify only the variable name without any preceding commands or values.)

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Given the following routing table:

How would an outgoing packet to the destination 192.168.2.150 be handled?

• A.It would be passed to the router 192.168.1.1 on eth0.
• B.It would be directly transmitted on the device eth0.
• C.It would be passed to the default router 192.168.178.1 on wlan0.
• D.It would be passed to the default router 255.255.255.0 on eth0.
• E.It would be directly transmitted on the device wlan0.

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