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Lpi LPI Level 3 Exam (LPI 303: Security) Sample Questions:

1. What does the following iptables rule accomplish:
iptables A INPUT s 208.77.188.166 j DROP

A) Nothing, there is a syntax error.
B) Forwards all incoming traffic to the host 208.77.188.166.
C) Accepts all traffic from 208.77.188.166.
D) Drops all traffic from 208.77.188.166.

2. A user is attempting to connect to a remote server via SSH and receives the following message:
The authenticity of host 'mail.example.com (208.77.188.166)' can't be established.
RSA key fingerprint is 92:32:55:e9:c4:20:ae:1b:2c:d7:91:40:90:89:1c:ad.
Are you sure you want to continue connecting (yes/no)?
What does this indicate?

A) The user's SSH client is incompatible with the server's RSA key.
B) The server's SSH host key cannot be found in the list of known hosts.
C) The RSA key fingerprint was found in the SpamCop database, indicating that the remote host is a known spammer.
D) The user's SSH client was unable to connect to the remote host's authentication agent for verification.

3. In which of the following scenarios MUST an administrator use ethernet bridging instead of routing when configuring an OpenVPN site? (Select TWO correct answers)

A) It will be necessary to use an MTU setting other than the default.
B) NetBIOS traffic must be able to traverse the VPN without implementing a WINS server.
C) The IPv4 protocol is required.
D) The IPX protocol is required.
E) Some OpenVPN clients will be installed on laptops and must be able to connect from different locations.

4. Which of the following are valid dmcrypt modes? (Choose THREE correct answers)

A) GMR
B) LRW
C) XTS
D) ESSIV
E) KWG

5. Someone who wishes to receive an encrypted file has provided a key UID and a key fingerprint for verification to the data sender. Assuming that this key is on a public keyserver, what command will fetch the public key from the server?

A) gpg getkeys UID
B) gpg findkeys UID
C) gpg recvkeys UID
D) gpg refreshkeys UID

Solutions: