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Q21. A company determines a need for additional protection from rogue devices plugging into physical ports around the building.
Which of the following provides the highest degree of protection from unauthorized wired network access?
A. Intrusion Prevention Systems
B. MAC filtering
C. Flood guards
D. 802.1x
Answer: D
Explanation:
IEEE 802.1x is an IEEE Standard for Port-based Network Access Control (PNAC). It is part of the IEEE 802.1 group of networking protocols and provides an authentication mechanism to wireless devices connecting to a LAN or WLAN.
Q22. A company has two server administrators that work overnight to apply patches to minimize disruption to the company. With the limited working staff, a security engineer performs a risk assessment to ensure the protection controls are in place to monitor all assets including the administrators in case of an emergency. Which of the following should be in place?
A. NIDS
B. CCTV
C. Firewall
D. NIPS
Answer: B
Explanation:
Q23. Public keys are used for which of the following?
A. Decrypting wireless messages
B. Decrypting the hash of an electronic signature
C. Bulk encryption of IP based email traffic
D. Encrypting web browser traffic
Answer: B
Explanation:
The sender uses the private key to create a digital signature. The message is, in effect, signed with the private key. The sender then sends the message to the receiver. The receiver uses the public key attached to the message to validate the digital signature. If the values match, the receiver knows the message is authentic.
Q24. Which of the following would provide the STRONGEST encryption?
A. Random one-time pad
B. DES with a 56-bit key
C. AES with a 256-bit key
D. RSA with a 1024-bit key
Answer: A
Explanation:
One-time pads are the only truly completely secure cryptographic implementations.
They are so secure for two reasons. First, they use a key that is as long as a plaintext message.
That means there is no pattern in the key application for an attacker to use. Also, one-time pad
keys are used only once and then discarded. So even if you could break a one-time pad cipher,
that same key would never be used again, so knowledge of the key would be useless.
Q25. A security analyst implemented group-based privileges within the company active directory. Which of the following account management techniques should be undertaken regularly to ensure least privilege principles?
A. Leverage role-based access controls.
B. Perform user group clean-up.
C. Verify smart card access controls.
D. Verify SHA-256 for password hashes.
Answer: B
Explanation: Active Directory (AD) has no built-in clean-up feature. This can result in obsolete user, group and computer objects accumulating over time and placing security and compliance objectives in jeopardy. You would therefore need to regularly clean-up these settings.
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Q26. Company A sends a PGP encrypted file to company B. If company A used company B’s public key to encrypt the file, which of the following should be used to decrypt data at company B?
A. Registration
B. Public key
C. CRLs
D. Private key
Answer: D
Explanation:
In a PKI the sender encrypts the data using the receiver's public key. The receiver decrypts the
data using his own private key.
PKI is a two-key, asymmetric system with four main components: certificate authority (CA),
registration authority (RA), RSA (the encryption algorithm), and digital certificates. Messages are
encrypted with a public key and decrypted with a private key.
A PKI example:
1.
You want to send an encrypted message to Jordan, so you request his public key.
2.
Jordan responds by sending you that key.
3.
You use the public key he sends you to encrypt the message.
4.
You send the message to him.
5.
Jordan uses his private key to decrypt the message.
Q27. A security manager must remain aware of the security posture of each system. Which of the following supports this requirement?
A. Training staff on security policies
B. Establishing baseline reporting
C. Installing anti-malware software
D. Disabling unnecessary accounts/services
Answer: B
Explanation:
The IT baseline protection approach is a methodology to identify and implement computer security
measures in an organization. The aim is the achievement of an adequate and appropriate level of
security for IT systems. This is known as a baseline.
A baseline report compares the current status of network systems in terms of security updates,
performance or other metrics to a predefined set of standards (the baseline).
Q28. A security technician wishes to gather and analyze all Web traffic during a particular time period.
Which of the following represents the BEST approach to gathering the required data?
A. Configure a VPN concentrator to log all traffic destined for ports 80 and 443.
B. Configure a proxy server to log all traffic destined for ports 80 and 443.
C. Configure a switch to log all traffic destined for ports 80 and 443.
D. Configure a NIDS to log all traffic destined for ports 80 and 443.
Answer: B
Explanation:
A proxy server is in essence a device that acts on behalf of others and in security terms all internal user interaction with the Internet should be controlled through a proxy server. This makes a proxy server the best tool to gather the required data.
Q29. Which of the following explains the difference between a public key and a private key?
A. The public key is only used by the client while the private key is available to all. Both keys are mathematically related.
B. The private key only decrypts the data while the public key only encrypts the data. Both keys are mathematically related.
C. The private key is commonly used in symmetric key decryption while the public key is used in asymmetric key decryption.
D. The private key is only used by the client and kept secret while the public key is available to all.
Answer: D
Explanation:
The private key must be kept secret at all time. The private key is only by the client. The public key is available to anybody.
Q30. A technician wants to securely collect network device configurations and statistics through a scheduled and automated process. Which of the following should be implemented if configuration integrity is most important and a credential compromise should not allow interactive logons?
A. SNMPv3
B. TFTP
C. SSH
D. TLS
Answer: A
Explanation: