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ECCouncil Certified Ethical Hacker Exam (CEHv13) Sample Questions (Q376-Q381):

NEW QUESTION # 376
Nedved is an IT Security Manager of a bank in his country. One day. he found out that there is a security breach to his company's email server based on analysis of a suspicious connection from the email server to an unknown IP Address.
What is the first thing that Nedved needs to do before contacting the incident response team?

• A. Leave it as it Is and contact the incident response te3m right away
• B. Block the connection to the suspicious IP Address from the firewall
• C. Disconnect the email server from the network
• D. Migrate the connection to the backup email server

Answer: C

NEW QUESTION # 377
which of the following protocols can be used to secure an LDAP service against anonymous queries?

• A. WPA
• B. NTLM
• C. SSO
• D. RADIUS

Answer: B

Explanation:
In a Windows network, nongovernmental organization (New Technology) local area network Manager (NTLM) could be a suite of Microsoft security protocols supposed to produce authentication, integrity, and confidentiality to users.NTLM is that the successor to the authentication protocol in Microsoft local area network Manager (LANMAN), Associate in Nursing older Microsoft product. The NTLM protocol suite is enforced in an exceedingly Security Support supplier, which mixes the local area network Manager authentication protocol, NTLMv1, NTLMv2 and NTLM2 Session protocols in an exceedingly single package.
whether or not these protocols area unit used or will be used on a system is ruled by cluster Policy settings, that totally different|completely different} versions of Windows have different default settings. NTLM passwords area unit thought-about weak as a result of they will be brute-forced very simply with fashionable hardware.
NTLM could be a challenge-response authentication protocol that uses 3 messages to authenticate a consumer in an exceedingly affiliation orientating setting (connectionless is similar), and a fourth extra message if integrity is desired.
* First, the consumer establishes a network path to the server and sends a NEGOTIATE_MESSAGE advertising its capabilities.
* Next, the server responds with CHALLENGE_MESSAGE that is employed to determine the identity of the consumer.
* Finally, the consumer responds to the challenge with Associate in Nursing AUTHENTICATE_MESSAGE.
The NTLM protocol uses one or each of 2 hashed word values, each of that are keep on the server (or domain controller), and that through a scarcity of seasoning area unit word equivalent, that means that if you grab the hash price from the server, you'll evidence while not knowing the particular word. the 2 area unit the lm Hash (a DES-based operate applied to the primary fourteen chars of the word born-again to the standard eight bit laptop charset for the language), and also the nt Hash (MD4 of the insufficient endian UTF-16 Unicode password). each hash values area unit sixteen bytes (128 bits) every.
The NTLM protocol additionally uses one among 2 a method functions, looking on the NTLM version.
National Trust LanMan and NTLM version one use the DES primarily based LanMan a method operate (LMOWF), whereas National TrustLMv2 uses the NT MD4 primarily based a method operate (NTOWF).

NEW QUESTION # 378
When considering how an attacker may exploit a web server, what is web server footprinting?

• A. When an attacker uses a brute-force attack to crack a web-server password
• B. When an attacker gathers system-level data, including account details and server names
• C. When an attacker creates a complete profile of the site's external links and file structures
• D. When an attacker implements a vulnerability scanner to identify weaknesses

Answer: B

NEW QUESTION # 379
Your company, SecureTech Inc., is planning to transmit some sensitive data over an unsecured communication channel. As a cyber security expert, you decide to use symmetric key encryption to protect the data. However, you must also ensure the secure exchange of the symmetric key. Which of the following protocols would you recommend to the team to achieve this?

• A. Switching all data transmission to the HTTPS protocol.
• B. Utilizing SSH for secure remote logins to the servers.
• C. Implementing SSL certificates on your company's web servers.
• D. Applying the Diffie-Hellman protocol to exchange the symmetric key.

Answer: D

Explanation:
The protocol that you would recommend to the team to achieve the secure exchange of the symmetric key is the Diffie-Hellman protocol. The Diffie-Hellman protocol is a key agreement protocol that allows two or more parties to establish a shared secret key over an unsecured communication channel, without having to exchange the key itself. The Diffie-Hellman protocol works as follows12:
* The parties agree on a large prime number p and a generator g, which are public parameters that can be known by anyone.
* Each party chooses a random private number a or b, which are kept secret from anyone else.
* Each party computes a public value A or B, by raising g to the power of a or b modulo p, i.e., A = g