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

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

2. Which permission bit allows a file to be executed?

A) Read
B) Execute
C) Write
D) SetUID

3. How are SELinux permissions related to standard Linux permissions?
(Choose TWO correct answers.)

A) Standard Linux permissions override SELinux permissions.
B) SELinux permissions are verified after standard Linux permissions.
C) SELinux permissions override standard Linux permissions.
D) SELinux permissions are verified before standard Linux permissions.

4. What is a buffer overflow?

A) A type of virus
B) A type of denial-of-service attack
C) A type of malware that disguises itself as legitimate software
D) A type of software vulnerability

5. Which of the following lines in an OpenSSL configuration adds an X 509v3 Subject Alternative Name extension for the host names example.org and www.example.org to a certificate?

A) subject= CN= www.example.org, CN=example.org
B) subjectAltName = DNS: www.example.org, DNS:example.org
C) subjectAltName: www.example.org, subjectAltName: example.org
D) extension= SAN: www.example.org, SAN:example.org
E) commonName = subjectAltName= www.example.org, subjectAltName = example.org

Solutions: