Lpi LPI Certifications 202-450 Questions & Answers

• Question 181:

  If the command arp -f is run, which file will be read by default?

  A. /etc/hosts

  B. /etc/ethers

  C. /etc/arp.conf

  D. /etc/networks

  E. /var/cache/arp

  Correct Answer: B

• Question 182:

  According to the configuration below, what is the e-mail address of the administrator for this domain?

  

  A. [email protected]

  Correct Answer: A

• Question 183:

  Which of the following is true, when a server uses PAM authentication and both /etc/pam.conf and /etc/pam.d/ exist?

  A. It causes error messages.

  B. /etc /pam.conf will be ignored.

  C. /etc / pam.d/ will be ignored.

  D. Both are used, but /etc/pam.d/ has a higher priority.

  E. Both are used, but /etc/pam.conf has a higher priority.

  Correct Answer: B

• Question 184:

  Which site-specific configuration file for the shadow login suite must be modified to log login failures? Please enter the complete path to that file.

  A. /etc/login.defs

  Correct Answer: A

• Question 185:

  You are not sure whether the kernel has detected a piece of hardware in your machine. What command, without options or parameters, should be run to present the contents of the kernel ringbuffer?

  A. dmesg

  Correct Answer: A

• Question 186:

  A server is being used as a smurf amplifier, whereby it is responding to ICMP Echo- Request packets sent to its broadcast address. To disable this, which command needs to be run?

  A. ifconfig eth0 nobroadcast

  B. echo "0" > /proc/sys/net/ipv4/icmp_echo_accept_broadcasts

  C. iptables -A INPUT -p icmp -j REJECT

  D. echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts

  E. echo "1" > /proc/sys/net/ipv4/icmp_echo_nosmurf

  Correct Answer: D

• Question 187:

  The following is an excerpt from the output of tcpdump -nli eth1 'udp':

  13:03:17.277327 IP 192.168.123.5.1065 > 192.168.5.112.53: 43653+ A? lpi.org. (25) 13:03:17.598624 IP 192.168.5.112.53 > 192.168.123.5.1065: 43653 1/0/0 A 24.215.7.109 (41) Which network service or protocol was used?

  A. FTP

  B. HTTP

  C. SSH

  D. DNS

  E. DHCP

  Correct Answer: D

• Question 188:

  What is the correct format for an ftpusers file entry?

  A. Use only one username on each line.

  B. Add a colon after each username.

  C. Add a semicolon after each username.

  D. Add ALLOW after each username.

  E. Add DENY after each username.

  Correct Answer: A

• Question 189:

  Which keys are stored in the authorized_keys file?

  A. public

  Correct Answer: A

• Question 190:

  An SSH port-forwarded connection to the web server www.example.com was invoked using the command ssh -TL 80 :www.example.com:80 [email protected]. Which TWO of the following are correct?

  A. The client can connect to the web server by typing http://www.example.com/ into the browser's address bar and the connection will be encrypted

  B. The client can connect to www.example.com by typing http://localhost/ into the browser's address bar and the connection will be encrypted

  C. The client can't connect to the web server by typing http://www.example.com/ into the browser's address bar. This is only possible using http://localhost/

  D. It is only possible to port-forward connections to insecure services that provide an interactive shell (like telnet)

  E. The client can connect to the web server by typing http://www.example.com/ into the browser's address bar and the connection will not be encrypted

  Correct Answer: BE