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Lpi LPIC Exam 303: Security, version 3.0 Sample Questions:

1. A LUKS device was mapped using the command: cryptsetup luksOpen/dev/sda1 crypt-vol Given that this device has three different keys, which of the following commands deletes only the first key?

A) cryptsetup luksDelkey /dev/sda 1 1
B) cryptsetup luksDelKey / dev /mapper/crypt- vol 1
C) cryptsetup luksDelKey / dev /mapper/crypt- vol 0
D) cryptsetup luksDelKey /dev/sda 1 0

2. What effect does the following command have on TCP packets?
iptables- A INPUT d 10.142.232.1 p tcp --dport 20:21 j ACCEPT

A) Accept all TCP traffic on port 20 and 21 for the IP address 10.142.232.1
B) Forward all TCP traffic not on port 20 or 21 to the IP address 10.142.232.1
C) Drop all TCP traffic coming from 10.142.232.1 destined for port 20 or 21.
D) Accept only TCP traffic from 10.142.232.1 destined for port 20 or 21.

3. Which of the following commands changes the source IP address to 192.0.2.11 for all IPv4 packets which go through the network interface eth0?

A) iptables ~t nat ~A PREROUTING ~i eth0 ~j SNAT --to~source 192.0.2.11
B) iptables ~t mangle ~A POSTROUTING ~i eth0 ~j SNAT -to~source 192.0.2.11
C) iptables ~t nat ~A POSTROUTING ~i eth0 ~j DNAT --to~source 192.0.2.11
D) iptables ~t nat ~A POSTROUTING ~o eth0 ~j SNAT --to~source 192.0.2.11
E) iptables ~t mangle ~A POSTROUTING ~0 eth0 ~j SNAT -to~source 192.0.2.11

4. What is the purpose of rkhunter?

A) To detect rootkits and other security threats
B) To manage installed packages
C) To automate host scans
D) To manage system log files

5. Which of the following practices are important for the security of private keys?
(Choose TWO correct answers.)

A) Private keys should be created on the systems where they will be used and should never leave them.
B) Private keys should be included in X509 certificates.
C) Private keys should be uploaded to public key servers.
D) Private keys should always be stored as plain text files without any encryption.
E) Private keys should have a sufficient length for the algorithm used for key generation.

Solutions: